If you need to count the number of words in a .PO translation file, you can use the pocount command. This command is part of the translate-toolkit package.
First, you have to install it in your Linux machine with the command:
sudo apt install translate-toolkit -y
Then you have to execute this command with the .po file as first argument:
pocount myfile.po Processing file : myfile.po Type Strings Words (source) Words (translation) Translated: 0 ( 0%) 0 ( 0%) 0 Fuzzy: 0 ( 0%) 0 ( 0%) n/a Untranslated: 491 (100%) 2615 (100%) n/a Total: 491 2615 0 Empty: 491 (100%) 2615 (100%) 0