Hi Albert,
It seems the Russian language for the following language constant is not translated yet(http://take.ms/9wQ5e)
You can translate it yourself using the language constant below.

COM_EASYSOCIAL_POINTS_HISTORY_USER_EARNED_POINTS_SINGULAR="%1$s earned %2$s point"

Let us know how it goes, thanks.

Thank you very much.
After upgrading EasySocial it is very difficult to perform the language file for changes. Please add all changes at the end of the English file

Hey Albert,
I'm not entirely sure what you mean here. What do you mean by 'difficult to perform the language file for changes'?

Please add all changes at the end of the English file

This language constant is already in EasySocial's english translation file(http://take.ms/z0m98).

You did not understand me. I added changes to the Russian file and all normally worked. But in the future if you will add changes in the middle of the English file I will be very difficult to find these additions.
Sorry for my bad English

Hey Albert,
If any new lines are added in the English file, other language files for example Russian will also get updated with the new line with a semi colon( ; ) in front of the language constant(http://take.ms/28gD1). So you just have to find lines with ; so you can translate them.

For the english file, we cant avoid this if there is a typo in the middle of the language file.
If we are adding new language constants, we can definitely try to add it at the bottom of the file.

EDIT: Not sure if you know this, if you want to protect your translations from being overwritten in future updates, you should use the language override method as documented here: https://stackideas.com/docs/easysocial/administrators/languages/creating-language-overrides