pointer88

[lyric summit]

Please be patient

Our volunteers look into many questions every day; sometimes it takes them a little while to answer.

Pro tip: you can rename the thread title with `.tr <thread name>`

Make it descriptive, including relevant context, but also to the point. This way you improve your chances of getting a more relevant and specific answer.

[latent bane]

The issue here is that you need to know ALL of the irregularities and that takes a long time to note

With the first group, it's like ~95% regular so noting the differences not as hard. The only 'true' irregular -er verb is « aller ». -ger and -cer verbs change purely because of orthographical concerns; -é_er verbs change because of vowel changes; and -eler/-eter verbs change because of consonant duplication

For the second group, however, it's only like ~65-70 percent regular so you need to make way more exceptions

The third group doesn't even have a canonical conjugation model, they have subpatterns that are really hard to program

(The irregular -oir can be an issue but they're so few that you can work with it)

It's not impossible, just takes a lot of time because you need to know the patterns. This is worse when you take into account derivations. For example, the second group verb « partir (to leave) » is irregular, its conjugation model does not follow the standard model of « finir ». However, it has a derivational verb « répartir (to divide equally) » whose conjugation does NOT follow « partir » and follows « finir ». Compare the three in the simple present:
finir
je finis, tu finis, il finit, nous finissons, vous finissez, ils finissent
partir
je pars, tu pars, il part, nous partons, vous partez, ils partent
répartir
je répartis, tu répartis, il répartit, nous répartissons, vous répartissez, ils répartissent

My advice for you, when building this thing, is to look at WordReference's conjugator and look at the left sidebar. It will tell you the model conjugation and what verbs follow this verb's conjugation.
https://www.wordreference.com/conj/frverbs.aspx?v=partir

As you can see, the 'standard' model for « ir » is « choisir ». Those that follow « partir »'s conjugation instead of « choisir » is listed on the left: consentir, démentir, sortir, etc