I want to translate this text in payment module: 
in file magento2-payment/i18n/pl_PL.csv I found that this text is translated. Just why does not it appear on the frontend?
https://github.com/dotpay/magento2-payment/blob/master/i18n/pl_PL.csv
I want to translate this text in payment module: 
in file magento2-payment/i18n/pl_PL.csv I found that this text is translated. Just why does not it appear on the frontend?
https://github.com/dotpay/magento2-payment/blob/master/i18n/pl_PL.csv
Make sure you are in pl_PL store view
Make sure you have exactly the right word in pl_PL.csv
Check in your payment module if you have well the translate function like this :
<?php echo __('The word to translate'); ?>
if all this doesn't solve the problem, you can translate it in database(Translate inline), you can enable it in : Stores>Configuration>Advanced>Developer>Translate Inline>Enable for Storefront>Yes. More info here