An error was occured after clicking spellchecking

Sorry, the title should have been “An error was encountered after clicking spellchecking”

I cannot use spell checking now.
After clicking spell checking in order to submit my writing in French, I saw the following message.

An error was encountered on the server:
aspell terminated prematurely with the error: 'Error: The file “/usr/lib/aspell/fr” can not be opened for reading.

Could someone give me some ideas to resolve this problem?

@Shigeharu - This is actually a known issue and we have it on our list. Please see the other thread about this for more information: Problems With "Check Spelling" - Language Forum @ LingQ