Update ru_RU.lang

Working on achievements.
Vexatos, for what en_US.lang from 1.6.x needed? And I think it should be named en_GB.lang. I upload en_GB.lang from 1.7.2.
Create en_GB.lang
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Last changes for today
Merge pull request #2 from VeryBigBro/patch-2

Fix a lot in ru_RU