@Abhi717670 Can you elaborate on the Translator that you are using for language translation.
AEM does not manipulate the Translation Output, and stores it as it is. You might need to explore the issue with ">>" on translator's end.
It can be also handled post translation. In AEM we can execute a utility script to clean this particular field of all the special characters, that are not supposed to be there.
For 2nd issue, you might need to troubleshoot translation configurations, as the same is working for French but not Spanish