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In my generated paradigm for кел, some forms have double <perf> tag:

келиптипкен:кел<v><iv><perf><perf><ger_perf><nom>
келивитпепкен:кел<v><iv><perf><neg><perf><ger_perf><nom>
келиптипкеш:кел<v><iv><perf><perf><gna_perf>
келивитпепкеш:кел<v><iv><perf><neg><perf><gna_perf>
келиптиптер:кел<v><iv><perf><perf><p3><sg>
келивитпептер:кел<v><iv><perf><neg><perf><p3><sg>

plus all of their inflections by case, person, etc. Looks like a double -{I}pt{I}, not sure if Tuvan allows this.

Opening an issue per @ftyers' request.

чор:чор<v><iv><aor><p3><sg>

Is this inflection correct, or should it be чоор?

Two more forms in Iskhakov & Pal'mbakh are not being generated:

• Прошедшее повествовательное время на -п-тыр, прошедшее историческое/заглазное/неожиданное, эрткен үэниң медээ хевири (I&P 373). The book says it's a past tense used to describe a sudden occurrence.

  кээп-тир мен
  кээп-тир сен
  кээп-тир
  кээп-тир бис
  кээп-тир силер
  кээп-тирлер
  

  Without the hyphen, the analyzer can parse the кээптир мен as кел<v><iv><perf><aor><p1><sg>, but it
  generates келиптир мен for that form.

• Прошедшее-настоящее время на -пышаан (I&P 379). Looks like it denotes an action that started in the past and is still going on, Anderson & Harrison annotate is as durative.

  келбишаан мен
  келбишаан сен
  келбишаан
  келбишаан бис
  келбишаан силер
  келбишааннар
  

  There is an analysis for келбишаан as a verbal adverb though: кел<v><iv><gna_still>. Are these forms
  considered analytic?

Some imperatives are still broken.

This includes the following regressions because of #2:

>       2 ^чугаалаваайн/*чугаалаваайн$
>       2 ^сагындырбаайн/*сагындырбаайн$
>       1 ^кортпаайн/*кортпаайн$
>       1 ^чугаалаваайн/*чугаалаваайн$
>       1 ^чорбаайн/*чорбаайн$
>       1 ^чажырбаайн/*чажырбаайн$
>       1 ^узуткаваайн/*узуткаваайн$
>       1 ^барбаайн/*барбаайн$
>       1 ^чажырбаайн/*чажырбаайн$
>       1 ^тайылбырлаваайн/*тайылбырлаваайн$
>       1 ^адаваайн/*адаваайн$

And the following form from tests/verbs.yaml:

[1/3][FAIL] саг<v><tv><imp><p1><du> => Missing results: саалы
[1/3][FAIL] саг<v><tv><imp><p1><du> => Unexpected results: сааалы

This is a list of generator errors that Aziyana Bayyr-ool identified while working on the error analysis for the shared task.

Incorrect inflections:

Note: чыглыңар:чыыл<v><iv><imp><p2><pl>: Aziyana says this form exists (meaning 'вы собирайтесь') but does not correspond to this lemma. The correct form for чыыл should be чыглыылыӊар ('давайте соберемся').

Incorrect lemmas:

Forms that are plausible but rarely or never used, so Aziyana has doubts about them:

мөгеейн:мөгей<v><iv><imp><p1><sg>
мөгееалы:мөгей<v><iv><imp><p1><du>
аржаяйн:аржай<v><TD><imp><p1><sg>
арзаяйн:арзай<v><TD><imp><p1><sg>
мажаяйн:мажай<v><TD><imp><p1><sg>

modes.xml includes some modes with install="yes", but the required
files aren't installed.

Some generic suggestions:

• -lexc and -twol modes probably aren't useful to users

• -spell modes should depend on --enable-ospell

• .deps files are never installed, so any modes using them shouldn't be
  installed.

• Messages for package app-dicts/apertium-tyv-9999:

• Failed to find '/usr/share/apertium/apertium-tyv/.deps/tyv.twol.hfst' in install image.

• QA: missing files required for mode tyv-twol.

• Failed to find '/usr/share/apertium/apertium-tyv/.deps/tyv.LR.lexc.hfst' in install image.

• QA: missing files required for mode tyv-lexc.

• Failed to find '/usr/share/apertium/apertium-tyv/tyv.zhfst' in install image.

• QA: missing files required for mode tyv-spell.

• Failed to find '/usr/share/apertium/apertium-tyv/.deps/acceptor.default.hfst' in install image.

• QA: missing files required for mode tyv-tokenise.

I've been comparing Apertium-generated paradigms with the ones in Iskhakov & Pal'mbakh 1961 grammar book (Ф. Г. Исхаков, А. А. Пальмбах. Грамматика тувинского языка: Фонетика и морфология.) and found some mismatches.
Disclaimer: I am not a speaker of Tuvan.

1. Some Apertium-generated imperative forms for кел:

   келеалыңар:кел<v><iv><imp><p1><pl>
   келейн:кел<v><iv><imp><p1><sg>
   келеалы:кел<v><iv><imp><p1><du>
   

   I&P book has келиилиңер, келийн, келиили respectively (pp. 391-392).

2. Some <p3><pl> forms have a double -лер. I haven't seen this in the literature and it looked suspicious.

   келдилер:кел<v><iv><ifi><p3><pl>
   келдилерлер:кел<v><iv><ifi><p3><pl>
   

   I&P has келдилер for this analysis (I&P 365), and Harrison, 2000 has keldi(ler). The same pattern in other tenses:

   келгеннер:кел<v><iv><ger_past><nom>+э<cop><aor><p3><pl>
   келгеннерлер:кел<v><iv><ger_past><nom>+э<cop><aor><p3><pl>
   келгендирлер:кел<v><iv><ger_past><nom>+э<cop><aor><evid><p3><pl>
   келгендирлерлер:кел<v><iv><ger_past><nom>+э<cop><aor><evid><p3><pl>
   ...