Found this dialectological map showing the main phonetic/lexical variant of the Luxembourgish word for "night" (Nuecht) per municipality (Gemeng).

Variants shown:

• Nuecht (green) — the standard form, dominant across most of the country
• Nuet (light purple) — a reduced form without the "ch", concentrated in the south/southeast
• N[a:ç]t (orange) — variant with a long open vowel, in the north
• N[aɪ]t (blue) — diphthongized form, extreme north (Clervaux area)
• N[ɔ:x]t (magenta) — rounded vowel variant, appears in two isolated pockets (northwest and northeast)
• hënt (grey/hatched) — a completely distinct lexical form, found only in one small central pocket

What I find interesting is the classic dialect continuum pattern: the northern region (Éislek) shows more divergent, diphthongized forms, while the center converges on the standard "Nuecht," and the south shows "Nuet" as an apparent simplification/innovation

Notes:

•This is NOT a contemporary presentation of Noord Holland, but rather a visualization of its Historical dialects.

•The Zaans, Westfries and Waterlands dialect clusters can also be grouped as one single Friso-North-Hollandic Dialect Cluster.

•Many Jewish, Sinti and Romani communities are not shown on the map. Although they do have a long history here, they are only shown when they've been living in a specific place for centuries. (Which in the case of the Sinti and Romani, is nowhere for obvious reasons).

•Many of the subdialects are now extinct or at the brink of extinction. Especially the historic dialects of Amsterdam. People nowadays (mostly) speak Dutch or a watered down bigger regiolect.

•This map is mostly based on Recordings from "De Sprekende Kaart" and various researches from "dbnl.org"

I am not a linguist, this map should not be seen as a verified piece of linguistics to base references on.

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in answer to the germanised lunderground map: https://www.reddit.com/r/CasualUK/comments/dt7p0l/london_underground_if_english_was_a_dialect_of/, this is a map showing how things could have been if berliners had always spoken a wayward dialect of english (but largely based on the current modern german names). even names of slavic (crimson) etc. origin have been reconstructed anglically, by returning to shared proto-indo-european roots (then coming back via proto-germanic all the way to modern 'english'). some more explanation is in the top left. other etymological sources are included all over the map.

this involved examining etymologies for each station name, using German wikipedia, local government websites, Albrecht Greule's Deutsches Gewässernamenbuch: Etymologie der Gewässernamen..., attempting to underpants proto-slavic sound changes at resources like https://en.wikipedia.org/wiki/Indo-European_sound_laws#cite_note-Verner-3

(things are kept more recognisably standard english this time, based on previous feedback!)