Refactor langSpecificCharsArray()

[SergeyPodgornyy]

Description

Improve readability of langSpecificCharsArray()

Motivation and context

Associative array could be easier read and support as to different arrays, because you can always see which value refers to which value

How has this been tested?

All tests passed successfully

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My pull request addresses exactly one patch/feature.
• I have created a branch for this patch/feature.
• Each individual commit in the pull request is meaningful.
• I have run tests to cover my changes.