I've some questions on your post
You wrote "but if I did learn another languages I suppose it would be Arabic" aa
Why did you use the auxiliary verb in this sentence?
I know four kinds of conditional sentence:
If I +infinitive, +infinitive
For example: If I make mistake, correct me
Form: if + Simple Present, will-Future
for example: If I see you make mistake I will correct you
Form: if + Simple Past, would + Infinitive
For example: If I saw you make mistake I would correct you surely
Form: if + Past Perfect, would + have + Past Participle
Foe example: If I had seen you make mistake when you was 10 years, I would have corrected you surely
So, now backing to to your sentence:
You wrote "but if I did learn another languages I suppose it would be Arabic" a
Maybe I'm wrong but according to the above rules the sentence should be apparently:
"But if I learned another language I suppose it would be Arabic"
(Pay attention: language without s in this case, because the word another is made of two words: an +other, so as you can not say an apples or a cats (can you?) in the same way you can not say "another languages", because "another" means to singular thing. But if you say "other", then you can use the plural form, for example you can say: other languages. I hope you have got the point)
Anyway, someone told me both are wrong in this case, and the correct is to say:
I'm not going to learn another languages, but if I had to learn another languages it would be Arabic
In addition, you wrote "seeing as it's the first language of so many citizen in Israel."aa
Should it be citizens?