Talk:Glossary of sound laws in the Indo-European languages

Missing laws from Collinge
A sorted working list with comments. At least the following would probably need to be added:
 * Fortunatov's law I
 * *l + dental > retroflex in Indo-Aryan
 * Law of Palatals
 * *K⁽ʷ⁾e > *Ča in Indo-Iranian
 * Rix's law
 * *HR̥C- is subject to laryngeal vowel coloring in Greek
 * Sievers' law II
 * *gʷʰ > *w in Germanic, various conditions have been proposed
 * Thurneysen's law
 * proposes fricative voicing dissimilation in Gothic after unstressed syllables; many details disputed
 * Thurneysen-Havet's law
 * *o > *a in Latin, at minimum before *wV́
 * Wackernagel's law II
 * *V₁V₂ > *V̄₂ crasis in Greek compound words

Missing laws concerning accentuation are particularly numerous:
 * From Balto-Slavic or Slavic: Dolobko's law, Ebeling's law, Fortunatov's law II, Garde's rule, Hartmann's law, Illič-Svityč's law, Kortlandt's law, Nieminen's law, Pedersen's law II, Šaxmatov's law
 * From Greek: Bártoli's law, Hirt's law II, Vendryes' law, Wheeler's law

Proposed but obsolete or disputed laws from Appendix I:
 * Bugge's rule: proposes as an extension to Verner's that voiceless stops > voiced fricatives word-initially when at least two syllables away from stress
 * Endzelin's law: proposes *éi > *ḗ > ie in Baltic
 * Georgiev's law: proposes word-initial *V̆CC > *CV̄C in Slavic
 * Streitberg's law: proposes that long grades would always occur preceding a zero grade

Some laws seem too narrow or too general in scope to belong in this article:
 * Aitken's law = Scots vowel length rule
 * Bugge's canon: levelling of Old Latin -d to -t in personal endings
 * Mac Neill's law: final *n, *l > nn, ll after a *short vowel in Irish
 * Notker's law: an orthographic rule from Old High German

while some are morphological or syntactic rather than sound laws: -- Trɔpʏliʊm • blah 20:56, 15 February 2020 (UTC)
 * Caland's law = Caland system; not usually considered a "law" (as also admitted by Collinge)
 * Wackernagel's law: governs the sentence position of clitics
 * Watkin's law: a general law of the special role of 3rd person in personal paradigm evolution