Languages below, if you know their alpha 3 code. Currently having some issues with Thai and Zulu though, so they're temporarily disabled until I have time to fix them.
I have not ~tested~ verified it for Latvian, I would be curious to hear your thoughts. It has been working pretty well for Maltese, Albanian and Macedonian though, which should be lower resource than Latvian!
As mentioned elsewhere, the first time user experience is abysmal. If you reach out though we can hop on a call and get you set up - or in a few weeks I'll have a video done and up. In the meantime, you should be able to create an expression (in the nav bar for desktop and mobile) fairly intuitively.
afr, amh, ara, ara-are, ara-bhr, ara-dza, ara-egy, ara-irq, ara-jor, ara-kwt, ara-lbn, ara-lby, ara-mar, ara-omn, ara-qat, ara-sau, ara-syr, ara-tun, ara-yem, asm, aze, bel, ben, bos, bul, bxr, cat, ces, chu, cop, cym, dan, deu, ell, eng, est, eus, fao, fas, fil, fin, fra, fro, gla, gle, glg, glv, got, grc, guj, hbo, heb, hin, hrv, hsb, hun, hyw, iku, ind, isl, ita, jav, jpn, kan, kat, kaz, khm, kir, kmr, kor, lao, lat, lav, lij, lit, ltc, lzh, mal, mar, mkd, mlt, mon, msa, mya, myv, nan, nep, nld, nno, nob, ori, orv, pan, pcm, pol, por, por-bra, por-prt, pus, qaf, qpm, ron, rus, san, sin, slk, slv, sme, som, spa, spa-arg, spa-bol, spa-chl, spa-col, spa-cri, spa-cub, spa-dom, spa-ecu, spa-esp, spa-gnq, spa-gtm, spa-hnd, spa-mex, spa-nic, spa-pan, spa-per, spa-pri, spa-pry, spa-slv, spa-ury, spa-usa, spa-ven, sqi, srp, sun, swa, swe, tam, tel, tha, tur, uig, ukr, urd, uzb, vie, wol, wuu, yue, zho, zht, zul
EDIT: I have tested it for Latvian, I know it technically works. I however have not had any Latvian speakers review it's quality