400-499

400 – Language

 * **400 [|Language]**
 * 400 Language
 * 401 [|Philosophy] & theory
 * 402 Miscellany
 * 403 [|Dictionaries] & encyclopedias
 * 404 Special topics
 * 405 Serial publications
 * 406 Organizations & management
 * 407 [|Education], research, related topics
 * 408 With respect to kinds of persons
 * 409 Geographical & persons treatment
 * **410 [|Linguistics]**
 * 411 [|Writing systems]
 * 412 [|Etymology]
 * 413 [|Dictionaries]
 * 414 [|Phonology]
 * 415 Structural systems ([|Grammar])
 * //416 No longer used—formerly [|Prosody (linguistics)]//
 * 417 [|Dialectology] & [|historical linguistics]
 * 418 Standard usage; [|Applied linguistics]
 * 419 Verbal language not spoken or written
 * **420 [|English] & [|Old English]**
 * 421 English [|writing system] & [|phonology]
 * 422 English etymology
 * 423 English dictionaries
 * //424 No longer used—formerly English [|thesauruses]//
 * 425 [|English grammar]
 * //426 No longer used—formerly English prosodies//
 * 427 [|English language variations]
 * 428 Standard English usage
 * 429 Old English (Anglo-Saxon)
 * **430 [|Germanic languages]; [|German]**
 * 431 [|German writing system] & [|phonology]
 * 432 German etymology
 * 433 German dictionaries
 * //434 Not assigned or no longer used//
 * 435 [|German grammar]
 * //436 Not assigned or no longer used//
 * 437 [|German language variations]
 * 438 Standard German usage
 * 439 Other Germanic languages
 * **440 [|Romance languages]; [|French]**
 * 441 [|French writing system] & [|phonology]
 * 442 French etymology
 * 443 French dictionaries
 * //444 Not assigned or no longer used//
 * 445 [|French grammar]
 * //446 Not assigned or no longer used//
 * 447 [|French language variations]
 * 448 Standard French usage
 * 449 [|Provençal] & [|Catalan]
 * **450 [|Italian], [|Romanian], [|Rhaeto-Romanic]**
 * 451 Italian writing system & [|phonology]
 * 452 Italian etymology
 * 453 Italian dictionaries
 * //454 Not assigned or no longer used//
 * 455 [|Italian grammar]
 * //456 Not assigned or no longer used//
 * 457 [|Italian language variations]
 * 458 Standard Italian usage
 * 459 Romanian & Rhaeto-Romanic
 * **460 [|Spanish] & [|Portuguese languages]**
 * 461 Spanish [|writing system] & [|phonology]
 * 462 Spanish etymology
 * 463 Spanish dictionaries
 * //464 Not assigned or no longer used//
 * 465 [|Spanish grammar]
 * //466 Not assigned or no longer used//
 * 467 [|Spanish language variations]
 * 468 Standard Spanish usage
 * 469 Portuguese
 * **470 [|Italic languages]; [|Latin]**
 * 471 [|Classical Latin] writing & phonology
 * 472 [|Classical Latin etymology & phonology]
 * 473 Classical Latin dictionaries
 * //474 Not assigned or no longer used//
 * 475 Classical [|Latin grammar]
 * //476 Not assigned or no longer used//
 * 477 [|Old], Postclassical, [|Vulgar Latin]
 * 478 Classical Latin usage
 * 479 Other Italic languages
 * **480 Hellenic languages; [|Classical Greek]**
 * 481 Classical Greek writing & [|phonology]
 * 482 Classical Greek etymology
 * 483 Classical Greek dictionaries
 * //484 Not assigned or no longer used//
 * 485 Classical Greek grammar
 * //486 Not assigned or no longer used//
 * 487 Preclassical & postclassical Greek
 * 488 Classical Greek usage
 * 489 Other Hellenic languages
 * **490 Other languages**
 * 491 East Indo-European & [|Celtic languages]
 * 492 [|Afro-Asiatic languages]; [|Semitic]
 * 493 Non-Semitic Afro-Asiatic languages
 * 494 [|Ural–Altaic], [|Paleosiberian], [|Dravidian]
 * 495 Languages of East & Southeast Asia
 * 496 African languages
 * 497 [|North American native languages]
 * 498 [|South American native languages]
 * 499 Miscellaneous languages