Wiktionary Translator

I'm sure this app is great for some languages, but for Vietnamese, the diacritical marks in Vietnamese text confuses the lookup and replaces the letters with "&" so that the lookup is broken. I was using this app to lookup Vietnamese words in the Vietnamese-language Wiktionary (not the English-language Wiktionary), so perhaps the bug is related to this. Please fix this issue.

Difficult to understand how it functions, and when we understand, it doesn't function well

Does anyone else experience weird page refresh or scrolling after installing this extension? That is, when the page is idle, sometimes the page refreshes itself for no reason, and scrolls to a different place. I am not 100% sure if this extension is the cause, but I have suspicions. All I wanted a simple extension that adds "Wiktionary" in the selection context menu, so I have no complaints about the functionality. But I'm tentatively giving it 3 stars.

Opens a popup with the message "Error: You must select a word first." Then the word has to be typed in before looking up.

Does not work on Chrome 61. No idea if works on different versions.

If it had function of switching languages quicker, than it would be ideal extension.