Is it possible to fix obvious errors of global spell checkers (Yandex, Google)? And How?

Question

Spellchecking

Both Google and Yandex, when entering text, offer a spell checker service - they underline in red what they consider an error. Moreover, they do this even when the underlined is not an error (say, the words "flash drive", "oscilloscope" are underlined). Presumably, a grammar database is maintained on their servers, and it is not without errors - perhaps subjective.
How can this be influenced? Here, in Internet translators, it is proposed to enter your own version if you do not like the ones translated automatically. It is clear why this is being done - to improve these same translators: the translation options offered by the user have a chance to get into dictionary databases.
There is no such service in spell check. Is it really left for us, not being able to intervene in the formation of a grammatical base, to simply put up with the creeping damage to our native language? Or is it still possible to get through to those who maintain this database? If so, how?