So here is what I did:
;; Is this the proper way of cleaning up defaults? If not, then could you
;; please show the correct and safe way of doing it?
(setq-default font-latex-match-reference-keywords-local nil
font-latex-match-sectioning-0-keywords-local nil
font-latex-match-sectioning-1-keywords-local nil)
;; Yes, I'm aware about "[{" stuff, but I don't like that text inside "[" or
;; "{" is highlighted with `font-lock-variable-name-face', I would rather
;; like it to stay `default' (what "" gives me). Any suggestions here?
(setq font-latex-match-warning-keywords
'(("def" "\\")
("define" "")
("dimexpr" "\\")
("let" "\\")
("the" "\\")
;; -----------------------------------------------------------------
("expandafter" "\\")
;; -----------------------------------------------------------------
("bgroup" "")
("egroup" "")
;; -----------------------------------------------------------------
("begingroup" "")
("endgroup" "")
;; -----------------------------------------------------------------
("autoinsertnextspace" "")
("blank" "")
("crlf" "")
("nowhitespace" "")
("relax" "")
("space" "")
;; -----------------------------------------------------------------
("hbox" "")
;; -----------------------------------------------------------------
("displaystyle" "")
("left" "")
("right" "")
;; -----------------------------------------------------------------
("placebookmarks" "")
("placepublications" ""))
font-latex-match-function-keywords
'(("defineconversion" "")
("definehead" "")
("definemakeup" "")
("definemathmatrix" "")
("definereferenceformat" "")
("definesymbol" "")
("definesynonyms" "")
("definetabulate" "")
("definetyping" "")
;; -----------------------------------------------------------------
("setupTABLE" "")
("setupalign" "")
("setupbar" "")
("setupbibtex" "")
("setupblank" "")
("setupbodyfont" "")
("setupcaption" "")
("setupcaptions" "")
("setupcite" "")
("setupcombinations" "")
("setupcombinedlist" "")
("setupdocument" "")
("setupexternalfigures" "")
("setupformulas" "")
("setupformulas" "")
("setuphead" "")
("setupindenting" "")
("setupinteraction" "")
("setupinterlinespace" "")
("setupitemize" "")
("setuplabeltext" "")
("setuplayout" "")
("setuplinenumbering" "")
("setuplist" "")
("setupmakeup" "")
("setupmathematics" "")
("setuppagenumbering" "")
("setuppapersize" "")
("setuppublicationlist" "")
("setuppublications" "")
("setupquotation" "")
("setupsynonyms" "")
("setuptabulate" "")
("setuptyping" "")
("setupurl" "")
("setupwhitespace" "")
;; -----------------------------------------------------------------
( "language" "")
("mainlanguage" "")
;; -----------------------------------------------------------------
("setmainfont" "")
("setmathfont" "")
("setmonofont" "")
("setsansfont" "")
;; -----------------------------------------------------------------
("switchtobodyfont" "")
;; -----------------------------------------------------------------
("framed" "")
("normal" "")
("scale" "")
("symbol" "")
("underbar" "")
;; -----------------------------------------------------------------
("doifnextcharelse" "")
("doifsomethingelse" "")
;; -----------------------------------------------------------------
("dosingleargument" "")
("dodoubleargument" "")
("dotripleargument" "")
;; -----------------------------------------------------------------
("start\\w+" "")
;; -----------------------------------------------------------------
("tikzset" "")
;; -----------------------------------------------------------------
("usemodule" "")
("usetikzlibrary" ""))
font-latex-match-variable-keywords
'(("documentvariable" "")
;; -----------------------------------------------------------------
("currentdate" "")
;; -----------------------------------------------------------------
( "combinationparameter" "")
("externalfigureparameter" "")
( "urlparameter" "")
;; -----------------------------------------------------------------
("delimiterfactor" "")
("nulldelimiterspace" "")
;; -----------------------------------------------------------------
("backspace" "")
( "topspace" "")
("paperheight" "")
("paperwidth" "")
( "textheight" "")
( "textwidth" "")
;; -----------------------------------------------------------------
("everymath" ""))
font-latex-match-reference-keywords
'(("cite" "")
("from" ""))
font-latex-match-math-command-keywords
'(("math" "")
("mathbb" "")
("mathcal" "")
("mathss" "")
;; -----------------------------------------------------------------
("langle" "")
("mfunction" "")
("nabla" "")
("rangle" "")
("text" "")
("vec" "")
;; -----------------------------------------------------------------
("integers" "")
("naturalnumbers" "")
("reals" ""))
;; In ConTeXt, there are also constructs like:
;; \starttitle[
;; title={My Title},
;; reference=xxx,
;; ]
;; Any chance of fontifying "My Title" similarly to
;; \title{My Title}
;; within current framework?
font-latex-match-sectioning-0-keywords
'(("part" "*[{"))
font-latex-match-sectioning-1-keywords
'(("chapter" "*[{")
("title" "*[{")))
Please, take a look at questions in comments, I'd very much appreciate if you could provide detailed answers. Thank you.
Kind regards,
Alexander