a Russian-language screen replaces the previous screen

Some days it happens as follows: whenever I am looking for the translation (in italian) of an English word, the correct translation appears on the screen, but after 1 seconds a Russian-language screen replaces the previous screen ... It has become impossible to use the program.
What does it depend on?
Thanks in advance.
Ezio Romanelli
ezioroma@tiscali.it
What does it depend on?
Thanks in advance.
Ezio Romanelli
ezioroma@tiscali.it