One Japanese feed https://assets.wor.jp/rss/rdf/reuters/top.rdf didn't work with process.py unless the newspaper4 installation was in format newspaper4k[all] as the tool instructed in its error report for the particular feed (also suggesting newspaper4k[ja]). There is seemingly nothing about this function in newspaper4k's docs.
One Japanese feed https://assets.wor.jp/rss/rdf/reuters/top.rdf didn't work with process.py unless the newspaper4 installation was in format newspaper4k[all] as the tool instructed in its error report for the particular feed (also suggesting newspaper4k[ja]). There is seemingly nothing about this function in newspaper4k's docs.