diff --git a/changes/28.0.0-alpha.1.md b/changes/28.0.0-alpha.1.md
index e172fa2c0..15ee7853b 100644
--- a/changes/28.0.0-alpha.1.md
+++ b/changes/28.0.0-alpha.1.md
@@ -1,4 +1,8 @@
  * \[**BREAKING**\] The filenames and package filenames are changed.
    - They will now use PascalCase instead of kebab-case.
    - To package manager maintainers: Please upgrade your script to make it capable to download and install the fonts under new names, and properly uninstall the fonts under old names.
+ * \[**BREAKING**\] Reorder of glyph variants:
+   - Influenced characters: `M`, `R`, `f`, `t`, `x`, Long S (`ſ`), Lower Chi (`χ`), Cyrillic Lower Em (`м`), Cyrillic Ya (`Я`, `я`), `5`.
+ * \[**BREAKING**\] Tags for variant features for Cyrillic lowercase Er and U are changed to `cv76` and `cv78`.
+     - Various other glyph variant tags are also changed to reflect this insertion.
  * Add hook-inward-serifed variants for `a` (#2085).
diff --git a/params/variants.toml b/params/variants.toml
index cfe723f37..3ecb9b360 100644
--- a/params/variants.toml
+++ b/params/variants.toml
@@ -658,27 +658,11 @@ sampler = "M"
 tagKind = "letter"
 
 [prime.capital-m.variants-buildup]
-entry = "middle"
+entry = "sides"
 descriptionLeader = "`M`"
 
-[prime.capital-m.variants-buildup.stages.middle."*"]
-next = "sides"
-
-[prime.capital-m.variants-buildup.stages.middle.hanging]
-rank = 1
-descriptionAffix = "middle being hanging off baseline"
-selectorAffix.M = "hanging"
-selectorAffix."M/sansSerif" = "hanging"
-
-[prime.capital-m.variants-buildup.stages.middle.flat-bottom]
-rank = 2
-descriptionAffix = "middle aligned to baseline"
-selectorAffix.M = "flatBottom"
-selectorAffix."M/sansSerif" = "flatBottom"
-
 [prime.capital-m.variants-buildup.stages.sides."*"]
-next = "serifs"
-mode = "prepend"
+next = "middle"
 
 [prime.capital-m.variants-buildup.stages.sides.straight]
 rank = 1
@@ -692,6 +676,21 @@ descriptionAffix = "slanted sides"
 selectorAffix.M = "slantedSides"
 selectorAffix."M/sansSerif" = "slantedSides"
 
+[prime.capital-m.variants-buildup.stages.middle."*"]
+next = "serifs"
+
+[prime.capital-m.variants-buildup.stages.middle.hanging]
+rank = 1
+descriptionAffix = "middle being hanging off baseline"
+selectorAffix.M = "hanging"
+selectorAffix."M/sansSerif" = "hanging"
+
+[prime.capital-m.variants-buildup.stages.middle.flat-bottom]
+rank = 2
+descriptionAffix = "middle aligned to baseline"
+selectorAffix.M = "flatBottom"
+selectorAffix."M/sansSerif" = "flatBottom"
+
 [prime.capital-m.variants-buildup.stages.serifs.serifless]
 rank = 1
 descriptionAffix = "serifs"
@@ -882,39 +881,18 @@ sampler = "R"
 tagKind = "letter"
 
 [prime.capital-r.variants-buildup]
-entry = "openness"
+entry = "leg"
 descriptionLeader = "`R`"
 
 [prime.capital-r.variants-buildup.stages.openness."*"]
-next = "leg"
-
-[prime.capital-r.variants-buildup.stages.openness.closed]
-rank = 1
-groupRank = 10
-keyAffix = ""
-selectorAffix.R = ""
-selectorAffix."R/sansSerif" = ""
-selectorAffix.RBar = ""
-selectorAffix.RRTail = ""
-selectorAffix.RRotunda = ""
-
-[prime.capital-r.variants-buildup.stages.openness.open]
-rank = 2
-groupRank = 20
-descriptionAffix = "open contour"
-selectorAffix.R = "open"
-selectorAffix."R/sansSerif" = "open"
-selectorAffix.RBar = ""
-selectorAffix.RRTail = "open"
-selectorAffix.RRotunda = ""
+next = "serifs"
 
 [prime.capital-r.variants-buildup.stages.leg."*"]
-next = "serifs"
-mode = "prepend"
+next = "openness"
 
 [prime.capital-r.variants-buildup.stages.leg.straight]
 rank = 1
-groupRank = 1
+groupRank = 10
 descriptionAffix = "straight leg"
 selectorAffix.R = "straight"
 selectorAffix."R/sansSerif" = "straight"
@@ -924,7 +902,7 @@ selectorAffix.RRotunda = "straight"
 
 [prime.capital-r.variants-buildup.stages.leg.curly]
 rank = 2
-groupRank = 2
+groupRank = 20
 descriptionAffix = "curly leg"
 selectorAffix.R = "curly"
 selectorAffix."R/sansSerif" = "curly"
@@ -934,7 +912,7 @@ selectorAffix.RRotunda = "curly"
 
 [prime.capital-r.variants-buildup.stages.leg.standing]
 rank = 3
-groupRank = 3
+groupRank = 30
 descriptionAffix = "standing leg (like Helvetica)"
 selectorAffix.R = "standing"
 selectorAffix."R/sansSerif" = "standing"
@@ -942,6 +920,26 @@ selectorAffix.RBar = "standing"
 selectorAffix.RRTail = "standing"
 selectorAffix.RRotunda = "standing"
 
+[prime.capital-r.variants-buildup.stages.openness.closed]
+rank = 1
+groupRank = 1
+keyAffix = ""
+selectorAffix.R = ""
+selectorAffix."R/sansSerif" = ""
+selectorAffix.RBar = ""
+selectorAffix.RRTail = ""
+selectorAffix.RRotunda = ""
+
+[prime.capital-r.variants-buildup.stages.openness.open]
+rank = 2
+groupRank = 2
+descriptionAffix = "open contour"
+selectorAffix.R = "open"
+selectorAffix."R/sansSerif" = "open"
+selectorAffix.RBar = ""
+selectorAffix.RRTail = "open"
+selectorAffix.RRotunda = ""
+
 [prime.capital-r.variants-buildup.stages.serifs.serifless]
 rank = 1
 descriptionAffix = "serifs"
@@ -1544,7 +1542,6 @@ selectorAffix.scripta       = ""
 
 [prime.a.variants-buildup.stages.double-storey-hook.hook-serifed]
 rank = 2
-nonBreakingVariantAdditionPriority = 100
 keyAffix = "hook-inward-serifed"
 descriptionAffix = "serifed hook"
 selectorAffix.a = "hookInwardSerifed"
@@ -1932,12 +1929,11 @@ sampler = "f"
 tagKind = "letter"
 
 [prime.f.variants-buildup]
-entry = "tail"
+entry = "hook"
 descriptionLeader = "`f`"
 
 [prime.f.variants-buildup.stages.hook."*"]
-next = "crossbar"
-mode = "prepend"
+next = "tail"
 
 [prime.f.variants-buildup.stages.hook.full]
 rank = 1
@@ -1966,7 +1962,7 @@ selectorAffix.fLenis = "flatHook"
 selectorAffix.fLTail = "flatHook"
 
 [prime.f.variants-buildup.stages.tail."*"]
-next = "hook"
+next = "crossbar"
 
 [prime.f.variants-buildup.stages.tail.serifless]
 rank = 1
@@ -3489,11 +3485,11 @@ sampler = "t"
 tagKind = "letter"
 
 [prime.t.variants-buildup]
-entry = "height"
+entry = "body"
 descriptionLeader = "`t`"
 
 [prime.t.variants-buildup.stages.body."*"]
-mode = "prepend"
+next = "symmetry"
 
 [prime.t.variants-buildup.stages.body.bent-hook]
 rank = 1
@@ -3553,8 +3549,7 @@ selectorAffix.tCurlyTail = {if = [{symmetry = "asymmetric"}], then = "flatHook",
 selectorAffix."tsLig/upperHalf" = "bentHook"
 
 [prime.t.variants-buildup.stages.symmetry."*"]
-next = "body"
-mode = "prepend"
+next = "height"
 
 [prime.t.variants-buildup.stages.symmetry.symmetric]
 rank = 1
@@ -3587,7 +3582,6 @@ selectorAffix.tCurlyTail = "asymmetric"
 selectorAffix."tsLig/upperHalf" = ""
 
 [prime.t.variants-buildup.stages.height."*"]
-next = "symmetry"
 
 [prime.t.variants-buildup.stages.height.full]
 rank = 1
@@ -3996,7 +3990,6 @@ selectorAffix."cyrl/ha" = "cursive"
 
 [prime.x.variants-buildup.stages.body.semi-chancery-straight]
 rank = 4
-nonBreakingVariantAdditionPriority = 100
 next = "END"
 descriptionAffix = "Semi-chancery shape with straight counter-leg"
 selectorAffix.x = "semiChanceryStraight"
@@ -4005,7 +3998,6 @@ selectorAffix."cyrl/ha" = "semiChanceryStraight"
 
 [prime.x.variants-buildup.stages.body.semi-chancery-curly]
 rank = 5
-nonBreakingVariantAdditionPriority = 100
 next = "END"
 descriptionAffix = "Semi-chancery shape with curly counter-leg"
 selectorAffix.x = "semiChanceryCurly"
@@ -4014,7 +4006,6 @@ selectorAffix."cyrl/ha" = "semiChanceryCurly"
 
 [prime.x.variants-buildup.stages.body.chancery]
 rank = 6
-nonBreakingVariantAdditionPriority = 200
 next = "END"
 descriptionAffix = "Chancery shape"
 selectorAffix.x = "chancery"
@@ -4266,46 +4257,15 @@ samplerExplain = "Long-S"
 tagKind = "letter"
 
 [prime.long-s.variants-buildup]
-entry = "bottom"
+entry = "top"
 descriptionLeader = "Long S (`ſ`)"
 
-[prime.long-s.variants-buildup.stages.bottom."*"]
-next = "top"
-
-[prime.long-s.variants-buildup.stages.bottom.non-descending]
-rank = 1
-keyAffix = ""
-selectorAffix."longs" = ""
-selectorAffix."longs/flatExt" = ""
-selectorAffix."longsBar" = ""
-
-[prime.long-s.variants-buildup.stages.bottom.descending]
-rank = 2
-descriptionAffix = "terminal descends baseline"
-selectorAffix."longs" = "descending"
-selectorAffix."longs/flatExt" = "descending"
-selectorAffix."longsBar" = "descending"
-
-[prime.long-s.variants-buildup.stages.bottom.tailed]
-rank = 3
-descriptionAffix = "terminal has a tail"
-selectorAffix."longs" = "tailed"
-selectorAffix."longs/flatExt" = "tailed"
-selectorAffix."longsBar" = "tailed"
-
-[prime.long-s.variants-buildup.stages.bottom.diagonal-tailed]
-rank = 4
-descriptionAffix = "terminal has a diagonal tail"
-selectorAffix."longs" = "diagonalTailed"
-selectorAffix."longs/flatExt" = "diagonalTailed"
-selectorAffix."longsBar" = "diagonalTailed"
-
 [prime.long-s.variants-buildup.stages.top."*"]
-next = "serifs"
-mode = "prepend"
+next = "bottom"
 
 [prime.long-s.variants-buildup.stages.top.bent-hook]
 rank = 1
+groupRank = 10
 descriptionAffix = "bending top hook"
 selectorAffix."longs" = "bentHook"
 selectorAffix."longs/flatExt" = "flatHookExt"
@@ -4313,11 +4273,47 @@ selectorAffix."longsBar" = "bentHook"
 
 [prime.long-s.variants-buildup.stages.top.flat-hook]
 rank = 2
+groupRank = 20
 descriptionAffix = "flat top hook"
 selectorAffix."longs" = "flatHook"
 selectorAffix."longs/flatExt" = "flatHookExt"
 selectorAffix."longsBar" = "flatHook"
 
+[prime.long-s.variants-buildup.stages.bottom."*"]
+next = "serifs"
+
+[prime.long-s.variants-buildup.stages.bottom.non-descending]
+rank = 1
+groupRank = 1
+keyAffix = ""
+selectorAffix."longs" = ""
+selectorAffix."longs/flatExt" = ""
+selectorAffix."longsBar" = ""
+
+[prime.long-s.variants-buildup.stages.bottom.descending]
+rank = 2
+groupRank = 2
+descriptionAffix = "terminal descends baseline"
+selectorAffix."longs" = "descending"
+selectorAffix."longs/flatExt" = "descending"
+selectorAffix."longsBar" = "descending"
+
+[prime.long-s.variants-buildup.stages.bottom.tailed]
+rank = 3
+groupRank = 3
+descriptionAffix = "terminal has a tail"
+selectorAffix."longs" = "tailed"
+selectorAffix."longs/flatExt" = "tailed"
+selectorAffix."longsBar" = "tailed"
+
+[prime.long-s.variants-buildup.stages.bottom.diagonal-tailed]
+rank = 4
+groupRank = 4
+descriptionAffix = "terminal has a diagonal tail"
+selectorAffix."longs" = "diagonalTailed"
+selectorAffix."longs/flatExt" = "diagonalTailed"
+selectorAffix."longsBar" = "diagonalTailed"
+
 [prime.long-s.variants-buildup.stages.serifs.serifless__non-descending]
 rank = 1
 enableIf = [{ bottom = "non-descending" }]
@@ -4986,7 +4982,6 @@ selectorAffix."grek/chi/sansSerif" = "curly"
 
 [prime.lower-chi.variants-buildup.stages.body.semi-chancery-straight]
 rank = 3
-nonBreakingVariantAdditionPriority = 100
 next = "END"
 descriptionAffix = "Semi-chancery shape with straight counter-leg"
 selectorAffix."grek/chi" = "semiChanceryStraight"
@@ -4994,7 +4989,6 @@ selectorAffix."grek/chi/sansSerif" = "semiChanceryStraight"
 
 [prime.lower-chi.variants-buildup.stages.body.semi-chancery-curly]
 rank = 4
-nonBreakingVariantAdditionPriority = 100
 next = "END"
 descriptionAffix = "Semi-chancery shape with curly counter-leg"
 selectorAffix."grek/chi" = "semiChanceryCurly"
@@ -5002,7 +4996,6 @@ selectorAffix."grek/chi/sansSerif" = "semiChanceryCurly"
 
 [prime.lower-chi.variants-buildup.stages.body.chancery]
 rank = 5
-nonBreakingVariantAdditionPriority = 200
 next = "END"
 descriptionAffix = "Chancery shape"
 selectorAffix."grek/chi" = "chancery"
@@ -5394,26 +5387,8 @@ sampler = "м"
 samplerExplain = "Cyrillic Lower Em"
 tagKind = "letter"
 
-[prime.cyrl-em.variants-buildup]
-entry = "middle"
-descriptionLeader = "Cyrillic Lower Em (`м`)"
-
-[prime.cyrl-em.variants-buildup.stages.middle."*"]
-next = "sides"
-
-[prime.cyrl-em.variants-buildup.stages.middle.hanging]
-rank = 1
-descriptionAffix = "middle being hanging off baseline"
-selectorAffix."cyrl/em" = "hanging"
-
-[prime.cyrl-em.variants-buildup.stages.middle.flat-bottom]
-rank = 2
-descriptionAffix = "middle aligned to baseline"
-selectorAffix."cyrl/em" = "flatBottom"
-
 [prime.cyrl-em.variants-buildup.stages.sides."*"]
-next = "serifs"
-mode = "prepend"
+next = "middle"
 
 [prime.cyrl-em.variants-buildup.stages.sides.straight]
 rank = 1
@@ -5425,6 +5400,23 @@ rank = 2
 descriptionAffix = "slanted sides"
 selectorAffix."cyrl/em" = "slantedSides"
 
+[prime.cyrl-em.variants-buildup]
+entry = "sides"
+descriptionLeader = "Cyrillic Lower Em (`м`)"
+
+[prime.cyrl-em.variants-buildup.stages.middle."*"]
+next = "serifs"
+
+[prime.cyrl-em.variants-buildup.stages.middle.hanging]
+rank = 1
+descriptionAffix = "middle being hanging off baseline"
+selectorAffix."cyrl/em" = "hanging"
+
+[prime.cyrl-em.variants-buildup.stages.middle.flat-bottom]
+rank = 2
+descriptionAffix = "middle aligned to baseline"
+selectorAffix."cyrl/em" = "flatBottom"
+
 [prime.cyrl-em.variants-buildup.stages.serifs.serifless]
 rank = 1
 descriptionAffix = "serifs"
@@ -5522,7 +5514,6 @@ selectorAffix."cyrl/njeKomi" = "serifedExceptBottomRight"
 [prime.cyrl-er]
 sampler = "р"
 samplerExplain = "Cyrillic Lower Er"
-nonBreakingTagForNewVariantSelector = "VXAA" # REMOVE IN NEXT MAJOR VERSION CHANGE
 tagKind = "letter"
 
 [prime.cyrl-er.variants-buildup]
@@ -5643,7 +5634,6 @@ selectorAffix."cyrl/U" = "serifed"
 [prime.cyrl-u]
 sampler = "у"
 samplerExplain = "Cyrillic Lower U"
-nonBreakingTagForNewVariantSelector = "VXAB" # REMOVE IN NEXT MAJOR VERSION CHANGE
 tagKind = "letter"
 
 [prime.cyrl-u.variants-buildup]
@@ -5726,7 +5716,6 @@ selectorAffix."cyrl/ef.BGR" = ""
 
 [prime.cyrl-ef.variants-buildup.stages.bowl.split]
 rank = 2
-nonBreakingVariantAdditionPriority = 100
 descriptionAffix = "split bowl"
 selectorAffix."cyrl/ef" = "splitBowl"
 selectorAffix."cyrl/ef.BGR" = ""
@@ -5757,14 +5746,12 @@ selectorAffix."cyrl/ef.BGR" = "serifless"
 
 [prime.cyrl-ef.variants-buildup.stages.serifs.top-serifed]
 rank = 2
-nonBreakingVariantAdditionPriority = 10
 descriptionAffix = "serif at top"
 selectorAffix."cyrl/ef" = "topSerifed"
 selectorAffix."cyrl/ef.BGR" = "topSerifed"
 
 [prime.cyrl-ef.variants-buildup.stages.serifs.serifed]
 rank = 3
-nonBreakingVariantAdditionPriority = 10
 descriptionAffix = "serifs at top and bottom"
 selectorAffix."cyrl/ef" = "serifed"
 selectorAffix."cyrl/ef.BGR" = "serifed"
@@ -5911,25 +5898,11 @@ samplerExplain = "Cyrillic Capital Ya"
 tagKind = "letter"
 
 [prime.cyrl-capital-ya.variants-buildup]
-entry = "openness"
+entry = "leg"
 descriptionLeader = "Cyrillic Capital Ya (`Я`)"
 
-[prime.cyrl-capital-ya.variants-buildup.stages.openness."*"]
-next = "leg"
-
-[prime.cyrl-capital-ya.variants-buildup.stages.openness.closed]
-rank = 1
-keyAffix = ""
-selectorAffix."cyrl/Ya" = ""
-
-[prime.cyrl-capital-ya.variants-buildup.stages.openness.open]
-rank = 2
-descriptionAffix = "open contour"
-selectorAffix."cyrl/Ya" = "open"
-
 [prime.cyrl-capital-ya.variants-buildup.stages.leg."*"]
-next = "serifs"
-mode = "prepend"
+next = "openness"
 
 [prime.cyrl-capital-ya.variants-buildup.stages.leg.straight]
 rank = 1
@@ -5946,6 +5919,19 @@ rank = 3
 descriptionAffix = "standing leg (like Helvetica)"
 selectorAffix."cyrl/Ya" = "standing"
 
+[prime.cyrl-capital-ya.variants-buildup.stages.openness."*"]
+next = "serifs"
+
+[prime.cyrl-capital-ya.variants-buildup.stages.openness.closed]
+rank = 1
+keyAffix = ""
+selectorAffix."cyrl/Ya" = ""
+
+[prime.cyrl-capital-ya.variants-buildup.stages.openness.open]
+rank = 2
+descriptionAffix = "open contour"
+selectorAffix."cyrl/Ya" = "open"
+
 [prime.cyrl-capital-ya.variants-buildup.stages.serifs.serifless]
 rank = 1
 descriptionAffix = "serifs"
@@ -5970,27 +5956,11 @@ samplerExplain = "Cyrillic Lower Ya"
 tagKind = "letter"
 
 [prime.cyrl-ya.variants-buildup]
-entry = "openness"
+entry = "leg"
 descriptionLeader = "Cyrillic Lower Ya (`я`)"
 
-[prime.cyrl-ya.variants-buildup.stages.openness."*"]
-next = "leg"
-
-[prime.cyrl-ya.variants-buildup.stages.openness.closed]
-rank = 1
-groupRrank = 10
-keyAffix = ""
-selectorAffix."cyrl/ya" = ""
-
-[prime.cyrl-ya.variants-buildup.stages.openness.open]
-rank = 2
-groupRrank = 20
-descriptionAffix = "open contour"
-selectorAffix."cyrl/ya" = "open"
-
 [prime.cyrl-ya.variants-buildup.stages.leg."*"]
-next = "tails"
-mode = "prepend"
+next = "openness"
 
 [prime.cyrl-ya.variants-buildup.stages.leg.straight]
 rank = 1
@@ -6010,6 +5980,21 @@ groupRank = 3
 descriptionAffix = "standing leg (like Helvetica)"
 selectorAffix."cyrl/ya" = "standing"
 
+[prime.cyrl-ya.variants-buildup.stages.openness."*"]
+next = "serifs"
+
+[prime.cyrl-ya.variants-buildup.stages.openness.closed]
+rank = 1
+groupRrank = 10
+keyAffix = ""
+selectorAffix."cyrl/ya" = ""
+
+[prime.cyrl-ya.variants-buildup.stages.openness.open]
+rank = 2
+groupRrank = 20
+descriptionAffix = "open contour"
+selectorAffix."cyrl/ya" = "open"
+
 [prime.cyrl-ya.variants-buildup.stages.tails."*"]
 next = "serifs"
 
@@ -6364,7 +6349,6 @@ selectorAffix.zhuangToneFive = "arched"
 
 [prime.five.variants-buildup.stages.middle.flat]
 rank = 2
-nonBreakingVariantAdditionPriority = 100
 descriptionAffix = "flat middle part"
 selectorAffix.five = "flat"
 selectorAffix.zhuangToneFive = "flat"