http://osm.mueschelsoft.de/taginfo/newkeys.htm and there you can see 21x `lenght` ;-)
PS: What was you motivation to add `length`? The length of the bridge could be calculated (automatically) from its way... or?

Hello gappleto97. At way/525495614 you have tagged `contruction` instead of `construction`, right? ;-) #newkey #typo

Hello VictorIE. At node/5112030988 you have tagged `contact:pintrest` instead of `contact:pinterest`, right? And if you have a look at contact=* you see, that you could (although pinterest isn't mentioned there) use only the username as value, linkedin, etc. too ;-)

Hello Minh Nguyen. At way/474098021 you have used `xxx:disused` instead of `disused:xxx`. Please have a look at osm.wiki/Lifecycle_prefix #newkey

Hello swimdb. At node/2195201259 you have tagged `wensit` instead of `website`, right? ;-) #newkey #typo

Hello Poliakoff Mykhailo. At node/5115531150 you have tagged `visiility` instead of `visibility`, right? #newkey #typo

Hello Bodruddoza. At node/5115168644 you have tagged `Uttara fuel station=..`. Should this be the `name`. What about the fuel station 10m beside: node/267193073 ? #newkey

Hello Mapphew. E.g. at node/5115859948 (and several others) you have tagged the misspelled `tower:typer` via copy'n'paste, right? I think you should review your changeset ;-) #newkey #typo

Hello Tomas Straupis. E.g. at node/4325643440 you have add the new (and so far unkown and undocumented) key `subitem`. What is it for? #newkey

Hello Andronik Fa. At way/200077401 and way/46271740 you have tagged `smothness` instead of `smoothness`, right? #newkey #typo

Hello Quentin SALLES. At node/1735196025 you have tagged `shleter` instead of `shelter`, right? #newkey #typo

Hello Ocivelo. At node/5114453699 you have tagged `phon=...` although there's another `phone` value. You can move `phone` to the `contact` prefix, too ... or remove the prefix from `website` ;-) #newkey #typo

Hello arizonastonecare. At node/5116136121 you have tagged `payment:=ye`. Do you forget some payment? #newkey #typo

Hello polari. At way/525715729 you have tagged `noute` instead of `note`, right? #newkey #typo

Hello eggie. At way/525991121 you have tagged `noet` instead of `note`, right? #newkey #typo

Hallo Kurt. Bei node/5116136839 hast du `Niegripp=50` getaggt. Sollte das ein `maxspeed=50` werden? #newkey

Hello Aditya joshi. At way/505271135 you haved tagged `NEB=public office` although there's already `amenity=public_office`, why? #newkey

and also `lenght_1` at way/461788753 ...

Hmm, and of course `Lenght` (lowercase), too ;-)

Hello JJIglesias. I think you should review all your changeset where you have copy'n'paste the misspelled `lenght` ;-) #newkey #typo