I submitted a pull request to change the English user-facing strings to exclude the words "Reddit," "Subreddit," and "Multireddit" wherever possible, but there are still more languages to translate.
If you would like to contribute, please consider making a fork of the repo and updating the language strings for your native language. Take care not to change the actual variable names (i.e. leave the word "reddit" and "subreddit" in the variable tags, but change the actual string values).
The languages are available in this folder here, in the various values-... folders: