Suggestions for langcode

The following packages have something in common with the package langcode. The packages are ordered in decreasing similarity.

• plainpkg: A minimal method for making generic packages
• localloc: Macros for localizing TeX register allocations
• pdftexcmds: LuaTeX support for pdfTeX utility functions
• ltxcmds: Some LaTeX kernel commands for general use
• collargs: Collect arguments of any command
• etoolbox-generic: A loader for etoolbox.sty in non-LaTeX formats
• iftex: Am I running under pdfTeX, XeTeX or LuaTeX?
• fltpoint: Simple floating point arithmetic
• hologo: A collection of logos with bookmark support
• youngtab: Typeset Young-Tableaux
• calcfrac: Calculates the value of an expression containing fractions
• addtoluatexpath: Add paths to Lua packages and input TeX files
• advice: Extend commands and environments
• catcodes: Generic handling of TeX category codes
• expkv-bundle: An expandable key=val implementation and friends
• expkv-cs: Define expandable key=val macros using expkv
• namedef: TeX definitions with named parameters
• lipsum: Easy access to the Lorem Ipsum and other dummy texts
• polexpr: A parser for polynomial expressions
• pdfmsym: PDF Math Symbols — various drawn mathematical symbols
• chinese-jfm: Luatexja-jfm files for Chinese typesetting
• schemata: Print topical diagrams
• expex-acro: Wrapper for the expex package
• opbible: Creating a study Bible with OpTeX
• luatexja: Typeset Japanese with Lua(La)TeX
• tuple: Expandable operations for tuples of numbers
• tokcycle: Build tools to process tokens from an input stream
• lparse: A Lua module for parsing key-value options
• lua-visual-debug: Visual debugging with LuaLaTeX
• chemfig: Draw molecules with easy syntax
• memoize: Externalization of graphics and memoization of compilation results in general