It has already been done! Here’s one you can find on Amazon.
Timekettle M2 Language Translator Earbuds - Supports 40 Languages & 93 Accent Online, Instant Voice Language Translator with Bluetooth & APP, True Wireless Earbuds for Music and Call Fit iOS & Android
Amazon.com : Timekettle M2 Language Translator Earbuds - Supports 40 Languages & 93 Accent Online, Instant Voice Language Translator with Bluetooth & APP, True Wireless Earbuds for Music and Call Fit iOS & Android : Office Products
It has already been done! Here’s one you can find on Amazon.