I tried to configure the following location with something like:
try_files $uri $uri/ $2/?lang=$1&$args;
However, the $2 variable does not catch the last part of the URI as
expected (either it catches the named capture or nothing at all, that I
not know nor care).
Using $3 instead of $2 does the job.
I thought that using named captures allowed for those capture not to be
counted in numerical variable
Am I wrong expecting that?