Instance is displaying suffix when instance is set to a Non-English language.

This is expected behavior due to the glide.translate.learn system property being set to true.

Please find documentation on this can be found here:

https://docs.servicenow.com/bundle/orlando-platform-administration/page/administer/localization/reference/r_UseTheTranslateAndLearnProperty.html

Set the system property glide.translate.learn to false.