Reduce the number of Alternate Links.
A country is specified wrong in alternate links: en-xk
A country is specified wrong in alternate links: sq-xk
A country is specified wrong in alternate links: sr-xk
An URL is specified multiple times in alternate links.
The href language en, x-default, az-az, az, da-dk, da, de-de, de-lu, de-at, et-ee, et, en-fi, en-se, en-ee, en-dk, en-lt, en-lv, en-no, en-ge, en-hu, en-cz, en-pl, en-gr, en-hr, en-il, en-rs, en-az, en-sk, en-si, en-kz, en-cy, en-jp, en-mt, en-de, en-at, en-is, en-lu, en-al, en-uz, en-mk, en-xk, en-ro, en-bg, fr-lu, fr, hr-hr, hr, kk-kz, kk, lv-lv, lv, lt-lt, lt, hu-hu, hu, mt-mt, mt, nb-no, nb, uz-uz, uz, pl-pl, pl, ro-ro, ro, sq-al, sq-xk, sk-cz, sk-sk, sl-si, sl, sr-rs, sr-xk, fi-fi, fi, sv-fi, sv-se, tr-cy, tr, is-is, is, cs-cz, cs, el-gr, el-cy, mk-mk, mk, ru-az, ru-kz, ru-uz, bg-bg, bg, he-il, he, ar-il, ar, ka-ge, ka, ja-jp, ja is specified more than once in alternate links.
(Nice to have)