Added localization files for Russian language

[ghost]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Internationalization and localization
• Other (please describe):

What is the current behavior?

• No localization files for the Russian language.
• French language name begins with a lowercase letter.

Issue Number: N/A

What is the new behavior?

• Added localization files for Russian language.
• Corrected the spelling of French language name.

Other information

Quality check

Before creating this PR, have you:

• Followed the code style guideline as described in CONTRIBUTING.md
• Verified that the change work in Release build configuration
• Checked all unit tests pass

[veler]

Hi,
Thank you so much for your contribution. Just one comment regarding "français" => "Français", otherwise it looks very good. :)
Thank you so much again :D