X-2

X-2
Spoken in:	n.a.
Timeline/Universe:	n.a.
Total speakers:	n.a.
Genealogical classification:	a priori experimental language
Created by:
Jörg Rhiemeier	2006

X-2 is an experimental language by Jörg Rhiemeier. Like its older cousin X-1, it is not meant to be naturalistic and has no conculture attached.

The syntax of X-2 is not based on tree structures as in human natural languages, but on a LIFO stack, similar to the Forth programming language and Jeffrey Henning's Fith. Its syntactic approach, however, is quite different from Fith, despite using a stack like Fith does. X-2 does not distinguish between nouns, verbs, adjectives and adverbs, but (like X-1) has only one single open word class encompassing all of these. It also features (again like X-1) a self-segregating morphology.

Credits go to Raymond A. Brown for suggesting the kind of syntax used in X-2 in a discussion in the CONLANG mailing list in February 2005.

X-2 is still very much under construction.

Phonology

X-2 lacks labial consonants and rounded vowels and thus can be spoken without moving the lips.

Consonants

	Alveolar	Postalveolar	Velar	Glottal
Voiceless stops	t		k
Voiced stops	d		g
Voiceless fricatives	s	c	x	h
Voiced fricatives	z	j
Nasals	n
Lateral	l
Trill	r

Vowels

	Front	Central	Back
High	i		u [ɯ]
Mid	e		o [ɤ]
Low		a

All vowels (including the back ones) are unrounded.

Morphology

X-2 is an isolating language; there are no derivational or inflectional affixes. The morphology used is self-segregating. Each morpheme is an alternating sequence of consonants and vowels beginning and ending with a consonant. Thus, there are no vowel clusters and no consonant clusters within morphemes. On the other hand, all morpheme boundaries are marked by a consonant following a consonant. For example, the phoneme sequence galakturjenistol can only be broken up into morphemes as galak-tur-jenis-tol.

Syntax

The syntax of X-2 is based on a stack, i. e. a data structure supporting only two basic operations. Imagine, for example, a stack of cards. You can either push an item onto the top of the stack, or pop the top item from the stack. The stack used in X-2 holds expressions which are either single lexemes or multiple lexemes connected by relationals (see below). An expression can be the equivalent of a word, a phrase, a clause or a whole sentence.

The stack-based syntax allows for many complicated syntactic rearrangements. Lexemes can be pushed onto the stack and left there for a long time before anything is done with them.

There are three classes of words in X-2. One are the lexemes, or content words. The lexemes of X-2 correspond to nouns, verbs, adjectives and adverbs in natural languages. Lexemes are pushed onto the stack. The lexemes are the only open word class in X-2.

The second class of words are the relationals, which express relations between lexemes. A relational pops expressions from the stack, combines them into a complex expression, and pushes that expression back onto the stack. The relationals can be likened to case endings and prepositions in human languages. However, they encode semantic roles rather than notions such as 'subject' or 'object'.

The third (and smallest) word class in X-2 are the stack operators. These do such things as duplicating the top item of the stack, swapping the topmost two items, and similar things.