Highlight option for foreign language words

It would be nice to make the option of color highlighting foreign

language words, as opposed to the main language when editing the note

text. For example, I make a note where the main language is Russian and

it is necessary to highlight the words or letters of foreign languages:

English, German, etc.This is very necessary when copying text from

external sources, there may be errors such as "С" Russian is written as

well as "C" English.