Ugllaeg/Abendall

So, this isn't only grammar, but also the phonology. Anyways.

Phonology
Pronunciation given where different from orthography.

Allophony
"Voiced" plosives lenite to voiced fricatives word-finally and in syllable coda before consonants, e.g. ag ar [aɣ aɹʲ] "I am", ygllar ['yɣ.ɬaɹʲ] "create(s)"

All phonemes except fricatives, "voiced" plosives, /j/ and /w/ become palatalized word-finally. However, if 2 words distinguish by the final phoneme (lenited plosive/true fricative) such as yd "out" and ydd "speak", the lenited plosive becomes palatalized ([yðʲ]).

If a lenited plosive /b̥~v~w/ occurs next to /a/, it's diphthongized /aʊ/, e.g. chwechab ['χwɛ.χaʊ] "is spoken"

If it occurs after any other vowel, the spelling is mostly irregular.

Vowels
A vowel can be made long by adding a circumflex above it.

Diphthongs:

[ɪ] final: ai, ei, oi, ui

[ʊ] final: word-final ab; ou; aw

[ɔ] final: ao, eo

Syllable structure
The syllable structure is generally (C)(C)V(C)(C). Homorganic consonants can't form consonant clusters.

Stress
Stress is generally on first syllable. Secondary stress is also present, but no words are distinguished only by it.

Writing rules
 can't occur before front vowels.

 can't take a circumflex nor form a diphthong, therefore it isn't interchangeable with

Nouns
Some tricks and exceptions:
 * If a word ends in a long vowel, the declension remains the same.
 * If a word ends in a short vowel, the  is removed from the endings (e.g. rhyfa > *rhyfaag > rhyfag)
 * If a word ends in a consonant,  and unstressed  in the ultimate syllable are reduced (e.g. skelen > *skelenag > skelnag)

Adjectives
Adjectives are simpler, and I guarantee it. In the positive, it's common to pluralize adjectives with -(a)g. Genitive is used with comparative forms, (e.g. Ag ar lêmad Rŷsach "I'm taller than Rŷs")

Verbs
Pro-drop is allowed when the subject was mentioned in same or previous sentence.

E.g. ''Gonskelen ar y'côtskelen och y'rhiall skelen Odsach. Ddar 140,264 pennag.'' "Gonskelen is the capital and largest city of Odas. (It) has 140.264 inhabitants." Note that the beginning of 2nd sentence isn't "Gonskelen ddar" or "ra ddar" but just "ddar".