It sounds like there may be a problem with the configuration of your Odoo installation. Some things to check include:
Ensuring that your server has enough resources (e.g. enough memory and CPU) to handle the export process
Checking the Odoo logs for any errors or messages that might indicate the cause of the problem
Checking the database for any issues or inconsistencies that might be causing the problem
Checking the Odoo settings to ensure that the export feature is properly configured
Verifying that the version of Odoo you are running is compatible with your operating system and dependencies.
for which module you are trying export translation? or in which version?
log show something about the problem?