Feature summary (what you would like to be able to do and where):
Top right here: https://cs.m.wiktionary.org/wiki/Speci%C3%A1ln%C3%AD:Historie/Wikislovn%C3%ADk:Pod_l%C3%ADpou
You can see english wordmark "Wiktionary"
Czech Wiktionary - nomobile version - uses Czech logo (this: https://commons.wikimedia.org/wiki/File:Wiktionary-logo-cs.svg)
Czech mobile version should use also Czech logo which is prepared here: https://cs.wiktionary.org/wiki/Soubor:Wiktionary-wordmark-cs.svg
Benefits (why should this be implemented?): Czech people will be not surprised on Czech language project to see foreign language logo
Discusion: https://cs.wiktionary.org/wiki/Wikislovn%C3%ADk:Pod_l%C3%ADpou_(technika)#Logo_v_mobilu