No
You set the namespace to some text, default is TinyDB1, that text should he the same on all screens
Get the value from TinyDB on screen SpeechTranslation and display it as test in a label. What will be displayed?
Also what about providing a screenshot of your relevant blocks from that screen?
Also learn to debug...
Use the companion app and Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.