From 1913, he was a
Privatdozent whose field was "Indo-European linguistics with special consideration to
Albanian,
Baltic and
Slavic languages“. In 1923, he became a
Professor extraordinarius, and in 1937 a
Hofrat. He wrote numerous works on Albanology and became a renowned specialist. In April 1933, the
paleontologist and Albanologist
Franz Nopcsa (Ferenc Nopcsa) shot his secretary and himself, leaving his Albanological papers to Jokl. After
Adolf Hitler came to power in
Germany, Jokl's manuscripts started being rejected and he was no longer invited to conferences. On May 20, 1938, he was discharged as a result of the
Anschluss of Austria and was prohibited from entering his former place of work. The Dean of the Faculty of Philosophy, Viktor Christian, tried to save Jokl's job, but this was in vain. Later that year, Jokl submitted an application (supported by the Dean) to be equalized with "persons of mixed blood of 1st degree“ in order to have admittance to libraries. The application was rejected.
Georg Solta, who went on to become a professor of Indo-European linguistics, would often visit him during the following four years, in order to further his studies and to maintain personal interaction with his mentor. Solta says that Jokl lived alone ascetically, though a maid would prepare food for him. Two rooms were filled with books and all of his free time was dedicated to research. Jokl tried to find a job abroad, but this was also in vain. His last chance was a librarian position that was created for him in Albania with a monthly salary of 600
Albanian franks. Franciscan priest and Albanian national writer,
Gjergj Fishta, intervened through a letter, dated 23 September 1939 to
Francesco Jacomoni, vice-regent in Albania to make Italy intervene with the Third Reich in order to allow Jokl transfer to Albania. Jokl himself wanted to emigrate to
Albania. However, neither the efforts of Gjergj Fishta, nor those of
Carlo Tagliavini, a professor of the
University of Padua, nor the appeal of
Galeazzo Ciano, Minister of Foreign Affairs of
Italy, to the Ministry of Foreign Affairs of Germany, yielded the necessary permission for him to emigrate to Albania. In one of his applications, he also asked for permission to take along his library, but was opposed by Dean Christian, who was very interested in keeping Jokl's extensive collection at the University. Jokl's library also contained his life work and the handwritten supplements to the Albanian vocabulary by
Gustav Meyer. == Arrest and death ==