feat: #1405 Latvian language support

[OskarsPakers]

Signed-off-by: Oskars Pakers oskars.pakers@gmail.com

Change Summary

Latvian language does not show up in the selection list. I think it is because i missed adding it in the lists.
Please check if i added in all places.

Change type

• feat: (new feature for the user, not a new feature for build script)
• fix: (bug fix for the user, not a fix to a build script)
• docs: (changes to the documentation)
• style: (formatting, missing semi colons, etc; no production code change)
• refactor: (refactoring production code, eg. renaming a variable)
• test: (adding missing tests, refactoring tests; no production code change)
• chore: (updating grunt tasks etc; no production code change)

Test/ Verification

Provide summary of changes.

Additional information / screenshots (optional)

Anything for maintainers to be made aware of

[CLAassistant]

All committers have signed the CLA.

[wingkwong]

LGTM

[dstala]

@OskarsPakers
Thanks for the PR! Changes look good~