In Hungarian the “next line” command sounds like “következő sor” but when I say it, then every time the app adds an additional letter “A” to the beginning and records “A következő sor” and then it types a letter “A” and only after it comes the line break.
Apparently it tries to follow correct Hungarian grammar in its own mind, because if you want to write a sentence starting with “Következő sor” then it is usually not correct (although if you type e.g. a story and you want to quote someone saying this in a direct way then it can be acceptable.)
I suggest you to turn off the function to oversmart the user 
and add the letter A automatically.
Thank you!