

Latvia is partly involved, yes, but it’s also part Russian and recently moved to Singapore. You may find the history section on Wikipedia interesting; it also lists the russian part-ownership as reason for many users leaving OnlyOffice (and I’ve seen quite a few posts on that at the time).
As for the open-source part, I stand corrected, thank you
I was programming in assembly for ARM (some cortex chip) and I kid you not the C program we were integrating with required 255, with just 1 it read it as false