ax-TZ
xr-lxs-qut
xr-lqt-qu
xr-p-lze
AaBbCcDd
AaBbCcDd-x-y-any-x
abcd-Latn
ax-TZ
zh-ab
xz
xz-CH
fra
fra-FX
fra-Latn
zh-Latm-CN # Typo
de-DE-1902 # Wrong variant
fr-shadok # Variant
AaBbCcDd-x-y-any-x # Language of 5-8 chars, registered
abcd-Latn # Language of 4 chars reserved for future use
fr-fra # Extended tag
fr-Lat # Extended
fr-shadok # Variant