If you want to change values in CldrNamesRu.php, you need to do it at http://cldr.unicode.org/ via http://cldr.unicode.org/index/survey-tool

And maybe an override in LocalNamesRu.php?

If it is in the ISO 639, you need to change it via CLDR survey tool. In the tool, you need to convince others to vote for your version of translation. (Currently, votes from Apple, Google and Microsoft agree that “языки разных семей” should be the wining translation. See https://st.unicode.org/cldr-apps/v#/ru/Languages_K_N/63ef268c21be0de8) Please do not manually change the CldrNamesRu.php as the next CLDR data import will override your changes.

Better late than never…
Opened a ticket: https://unicode-org.atlassian.net/browse/CLDR-13673

sounds like something that should already be fixed. Can we fix this locally?

Ok for langco? @Amire80 @jhsoby

Thank you for reporting this issue. The language committee can't help you here.

In T245927#7152696, @Esc3300 wrote:

sounds like something that should already be fixed.

It would probably have been fixed a year ago if had followed the instructions. Please email me your request for access and I'll give you permissions to fix the translation:
https://translatewiki.net/wiki/CLDR

Meanwhile I've alerted the Google and Apple translators about the matter, because we'll need another org to agree with us.

FWIW, one of the other translators referenced "ГОСТ 7.75-97" as rationale for the current translation. There is indeed a map at https://ru.wikipedia.org/wiki/ГОСТ_7.75–97 where "mul" is listed as "Разных семей языки". That's all I know.

It seems the process at CLDR isn't really working. This can be fixed at WMF sites directly. langco usually reviews such requests. The question is if the updated Russian name accurately reflects the use of the code.

In T245927#7164813, @Esc3300 wrote:

I updated the task for LocalNamesRu.php and added the usual one week for patches as due dates. It may still be fixed/communicated to CLDR as well.

Based on what is this ready to go? I don't see LangCom approval.

Based on T285076#7164202 . Seems I asked them for review/input by error.

I updated the task for LocalNamesRu.php and added the usual one week for patches as due dates

That's not how they are used. Please don't add Due dates for tasks you are not working on yourself.

In T245927#7164866, @Nikerabbit wrote:

I updated the task for LocalNamesRu.php and added the usual one week for patches as due dates

That's not how they are used. Please don't add Due dates for tasks you are not working on yourself.

Do you have anything to support your POV? It seemed fine to Aklapper T256649#7157111 and the timeframe is the one from T284276. Note it doesn't apply to the person working on it, just to the update step of local names.

For comparison: How do you monitor the CLDR part?

It seemed fine to Aklapper

This is not a hard deadline, as pointed out in T284276#7160239. Please do not set Due Dates. Thanks.

Because of all the random discussion here I have a hard time understanding where we are now.

Language committee: What is your current understanding of what we should be doing?

@Lydia_Pintscher (current) task description should be complete and accurate

Shall we move ahead with this or seek further input on Project Chat in Russian?

I left a note on Wikidata:Форум#"multiple languages" name for "mul" language code in Russian

the rename doesn't seem to be problematic for WD either