As you see in word "th0se" zero is instead of "o". However, checktool shows error only in last word "dfdfdfdf". I have a lot of zeros after ocr recognition and want to make language tool to detect these zeros. Is it possible?
The current configuration in English ignores every word containing a digit. This behavior has pros and cons... To change this behavior you need to add this line:
in this file (for American English):
I think you can solve your problem easily using a text editor. Replace any '0' (zero) joined to a letter with a 'o'. Use a regular expression like this: replace "(\w)0" with "$1o", and replace "0(\w)" with "o$1".
You'll need to supervise the corrections anyway. You cannot do it automatically. Either with the regexp strategy or with the spell-checker (properly configured), you have to oversee the changes. There is no magic bullet.