ps_emailalerts - sometimes is missing "mails" folder in specific language

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

I don't know, how it happened, but if customer have more languages, sometimes there is specific language missing in folder "mails" in module "ps_emailalers".

And then, mail never arrived, because of missing template in specific language.

I don't have more informations. I don't know how to reproduce, but I was solving this problem about 5 times this year.

Everytime I solved it simple by copying english folder mails to specific language.
for example:
/modules/ps_emailalerts/mails/en/ -> /modules/ps_emailalerts/mails/sk/

I don't know, how this happened, so I am opening issue for investigating this problem or get to know for future solution.

Expected behavior

"mails" folder in module "ps_emailalerts" should have all languages or use default language if missing language at least.

Steps to reproduce

I don't know how to reproduce this problem :(

PrestaShop version(s) where the bug happened

8.1.7

PHP version(s) where the bug happened

8.1

If your bug is related to a module, specify its name and its version

ps_emailalerts - latest

Your company or customer's name goes here (if applicable).

https://www.openservis.cz/

Start by inspecting the module path modules/ps_emailalerts/mails/, comparing the en and sk language template folders mentioned in the report. Investigate how ps_emailalerts selects or creates language-specific mail templates; reproduction is not provided. Done means missing-language templates no longer prevent delivery, either through complete folders or the default-language fallback described in the expected behavior.