I can confirm the help menu has bugs... and missing links. (looking through them now will post what I spot)
Champions. "...with these for improve their stats." Typo (should read 'to improve') followed by lots of obsolete mechanics. (Soulbound isn't implemented, champion death now increases doomsday not just giving an injury. And that itself is probably a bug.
Spells "From the SPELLBOOK on the main screen..." There is no 'spellbook' on the main screen. There is a 'spells tab' instead.
Quests page talks about nonexistant mechanics.
City level-up population thresholds are wrong.
Equipment and stats - soulbound references
Enemy units - typos. 'Whn'
Magic casting time - I have yet to see a multi-turn strategic spell. An example would be nice if there are some.
Unit Stats - all obsolete and incorrect
Unit Combat stats - Are blunt/slashing/piercing in the game?
Unit Weapon stats actually goes into a discussion of combat abilities and traits. Not all of it seems relevant or in any way related to weapons.
Economy - surely it'd be better to have a separate section for logistics. Food/production/essence/logistics are mentioned in City details then logistics is ignored till the very last bit.
Also what order are they in? It seems a bit random.
Missing icons. Tiny placeholder descriptions.
Only 2 have icons. No descriptions or helpful information.
Units and Monsters:
Both are indeed assigned to the wrong tabs.
Tiny, bland descriptions.
Not grouped by Sovereign or faction.
Lack flavour text
Lack resist chance and effect of resisting it
Lack 'General spells' so spells available to all have a blank field
Mentions cooldown/maint cost only in tooltip not full description.
No separation of unit spells/Sovereign spells or Battle/Strategic effects.
Tooltip provides more information and sometimes conflicting information e.g.
Defending city gets 2 free sniper units.
+1 Sniper Defender"
No flavour text.
Doesn't show stats
Doesn't show crafting ingredients
Does have flavour text though.
Tooltip provides more/different information to description side.
Lacks a description of function
Lacks flavour text
Lacks links to units/items requiring those resources