Linguistic check

checking  https://git.door43.org/ru_gl/ru_ta/src/branch/master/checking
intro  https://git.door43.org/ru_gl/ru_ta/src/branch/master/intro
process  https://git.door43.org/ru_gl/ru_ta/src/branch/master/process
translate  https://git.door43.org/ru_gl/ru_ta/src/branch/master/translate