Could one of the native speakers break this down for us?
Why is this phrase in the "Food" lessons?
I can speak Irish Gaelic and I know you can say "Is maith liom Gaeilge" in irish and it means the same thing. Can you say "Is math leam Gàidhlig" in Scottish Gaelic? Since math and maith mean the same thing?
Other than being idiomatic, is there a principle that explains why we use is here and not tha?
Does toil = will?
Something like that. The phrase "is toil leam X" is best translated as "I like X" though.
Is "is" the first person singular (English "I")?
No, it's the (copula version of the) verb 'be'.
'me/I' is wrapped up in the prepositional pronoun at the end, "leam" (le + mi)
How do you say I love Gádhlhig?