$ axel -n4 https://dumps.wikimedia.org/enwiktionary/latest/enwiktionary-latest-pages-articles.xml.bz2 && bunzip2 enwiktionary-latest-pages-articles.xml.bz2 # 1.

$ axel -n4 https://dumps.wikimedia.org/enwiktionary/latest/enwiktionary-latest-pages-articles.xml.bz2 && bunzip2 enwiktionary-latest-pages-articles.xml.bz2 # 1.1G -> 8.1G $ grep '<title>' enwiktionary-latest-pages-articles.xml >titles # 282M $ sed 's/ *<title>//' titles |sed 's/<\/title>//' >clean-titles # 126M $ grep '^[qwertyuiop]*$' clean-titles | awk '{ print length(), $0 }' | sort -nr|grep ^1[23456789] 15 retroproiettori # italian <-- joint italian winner 15 retroproiettore # italian <-- joint italian winner 13 topprioriteit # dutch <-- dutch winner 13 ripitturerete # italian 13 retorqueretur # latin <-- joint latin winner 13 repropitietur # latin <-- joint latin winner 13 purpurroterer # german <-- german winner 13 proterreretur # latin <-- joint latin winner 13 perterreretur # latin <-- joint latin winner 13 perquireretur # latin <-- joint latin winner 12 teetertotter # english <-- english winner 12 riproporrete # italian 12 ripitturerei # italian 12 riotturerete # italian 12 retorquetote # latin 12 retorquerere # latin 12 requiriertet # german 12 requireretur # latin 12 repropitiere # latin 12 repperiretur # latin 12 purpurrotere # german 12 prototypique # french <-- french winner 12 proterruerit # latin 12 proterrituro # latin 12 proterrituri # latin 12 proterriture # latin 12 proterretote # latin 12 proterrerere # latin 12 protereretur # latin 12 proriperetur # latin 12 proietterete # italian 12 priorytetowy # polish <-- joint polish winner 12 priorytetowo # polish <-- joint polish winner 12 prioriteetti # finnish <-- finnish winner 12 prepotettero # italian 12 portretterte # bokmål <-- joint bokmal winner 12 portretterer # bokmål <-- joint bokmal winner 12 portretteert # dutch 12 piroetterete # italian 12 pipettiertet # german 12 perterruerit # latin 12 perterrituro # latin 12 perterrituri # latin 12 perterriture # latin 12 perterretote # latin 12 perterrerere # latin 12 perquiritote # latin 12 perquirerere # latin 12 perpetuerete # italian 12 perpetrerete # italian 12 perpeteretur # latin 12 perequitetur # latin 12 iperprotetto # italian 12 iperprotetti # italian 12 iperprotette # italian 12 eqqoqqortooq # greenlandic <-- greenlandic winner