How to language tool identifying the POS tag of the word

Hi All.

Please help me to know, how the language tool is identifying the POS Tags. “variety” is “NN”, i could not find this word using my custom rule. Please let me know the details for the POS tag identification on english words

You could post your rule so we can see what you are trying to do. You know about the languagetool wiki? If not, just google languagetool wiki tips tricks.

I got it using the " Text Analysis". Actually, I thought “variety” is “NN” but its “NN:UN”. Now got it!!
Thanks for your reply