On 21 August 2016, he scored his first goal in the 2016–17 Nemzeti Bajnokság I in a 5–1 victory for Videoton over Debreceni VSC. Lang scored in the 23rd minute and was able to repeat his feat with another goal in the same match in the 56th minute.[4]
Dijon
Lang signed with Dijon FCO in September 2016; his signing was registered minutes before the transfer window deadline.[5]
In January 2022, he extended his contract until Summer 2025,[10] and expressed his happiness at Omonia.[11] On 17 April 2022, he made his 100th appearance for the club, in a 1–0 home win against Ethnikos Achna in the Cypriot First Division.[9]
On 29 March 2024, he broke his leg during training.[12] He has to miss 1 month, according to the doctors of his club.
Lang was selected for Hungary's UEFA Euro 2016 squad.[17] On 14 June 2016, he started and played the full match of Hungary's 2–0 win over rivalsAustria in Bordeaux.[18] He went on to play the full 90 minutes against both Iceland and Portugal, as Hungary qualified for the knockout stage as Group F winners, unbeaten in three matches.[19][20] On 26 June, Lang played the full match against Belgium in Toulouse, as Hungary were beaten 4–0 in the round of 16.[21]
On 1 June 2021, Lang was included in the final 26-man squad to represent Hungary at the rescheduled UEFA Euro 2020 tournament.[23] He was an unused substitute in all three of the team's Group F matches, as the Magyars lost to Portugal and drew with both France and Germany.[24]
On 16 June, he started the team's opening match of the tournament against Switzerland, playing the first 45 minutes of the 3–1 loss before being substituted for Bendegúz Bolla at half time.[28] He was an unused substitute against both Germany and Scotland as Hungary finished third in Group A and were eliminated from the tournament.[29]