For the last 2 decades I’ve lived most of my life in English, so it’s not an issue, however my mother tongue is Spanish, and like you from hearing it the name of the notes so many times they are tattooed in my brain, but we don’t have an alphabet instead is do-re-mi-fa-sol-la-si (from C to B) so at times I translate to Spanish to find notes on the fretboard quickly, not sure why it just comes that way… I never do it for chords when playing guitar, only to find single notes on the fretboard 
Regarding taking a course in your language, I guess that if you want to communicate in musical circles about theory and such then it would help, or just if you want to do it, but when we play it doesn’t matter really, the music is the same
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