Since this appears to be a customized or re-signed app, it likely cannot be installed from the Google Play Store. You will need to "sideload" it.
Tap on the file and follow the on-screen prompts to install. taptotranslate161_signapk
Once installed, open the app to use the translation features. Important Considerations and Safety Tips Since this appears to be a customized or
This guide explains what is, its likely purpose within Android customization, and how to use it safely. What is taptotranslate161_signapk ? its likely purpose within Android customization
Based on the naming convention, represents an Android application package (APK) file for a "Tap to Translate" tool, specifically version 1.61 (161), that has been processed with signapk [1].
Where did you (e.g., specific forum, developer site)?