It does not rhyme, but it was created using only existing words. With apologies to Rick Astley:

We’re no strangers to love, you know the rules and so do I
Xen’komanu’ta vasina’ra. Il’ki raxhu’ny ji xe’hanan.
1PL-foreign-NEG love-LOC. 2S-know social_rules and 1S-do_too.
We are not foreign in the area of love. You know the social conventions and I do as well.

A full commitments what I’m thinking of
Xe’xan erid’het demna ji timki.
1S-plan committed_to_thing conscience_related and bodily.
I plan a commitment of conscience/rationality and body.

You wouldn’t get this from any other guy.
Il’rala’dori’ta me’he’sy luru
2S-PASS-give-NEG man-INSTR other.
You won’t be given that by other men.

I just wanna tell you how I’m feeling, gotta make you understand.
Xe’vana ‘demu il’han demna’het’xe. Xe’vana ‘aru kirkivsi.
1S-like (INF)tell 2S-ALL heart-GEN1S. 1S-want (INF)be understandable.
I want to tell you about my heart. I want to be understandable [for you].

Never gonna give you up, never gonna let you down
Xe’ki’xan’ta ‘nesyk il, xe’ki’xan’ta ‘uvuk il
1S-FUT-plan-NEG (INF)disgust 2S, 1S-FUT-plan-NEG (INF)betray 2S
I will not plan to disgust you, I will not plan to betray you. (This was supposed to have a certain connotation of ‘I won’t even think of it’, but it does not transfer well. However, this is required to be singable.)

Never gonna run around and desert you
Xe’ki’xan’ta ‘sydi ulsihan ji ‘tes il
1S-FUT-plan-NEG (INF)be_quick to_somewhere and (INF)get_away 2S.
I do not plan to run anywhere and to get away from you

Never gonna make you cry, never gonna say goodbye
Xe’ki’xan’ta ‘lija ‘sil, xe’ki’xan’ta ‘duxu il
1S-FUT-plan-NEG (INF)cause (INF)cry, 1S-FUT-plan-NEG (INF)beat 2S
I will not plan to cause [you] to cry, I will not plan to beat you.

Never gonna tell a lie and hurt you.
Xe’ki’xan’ta ‘vurak il’han, xe’tanmi.
1S-FUT-plan-NEG (INF)lie 2S-ALL, 1S-be_honest.
I will not plan to lie to you, I am honest. (This last bit is required because the song has ‘give you up’ all by itself at times, which would be parsed as an imperative. Thus at these times, we can sing “xe’tanmi”)

We’ve known each other for so long
Xen’nitura xen asty’jet.
1PL-recognize 1PL long_time-TEMP.
We know us since a long time. (can be parsed as ‘for a year’ as well)

Your heart’s been aching, but you’re too shy to say it
Demna’het’il mi’tore ,il’xone, venil
heart-GEN2S 3S-hurt ,2S-be_silent, but
Your heart hurts but you are silent

Inside we both know what’s been going on
Xen’sikeva ‘ltimki, ‘siriva.
1PL-do_habitually (INF)ltimki, (INF)pretend
We habitually pretend for social conventions’ sake, pretend

We know the game and we’re gonna play it.
Xen’ki milhan’het. Xen’ki’kimara.
1PL-know game. 1PL-FUT-play.
We know the game and we will play it wildly.

And if you ask me how I’m feeling, don’t tell me you’re too blind to see.
Il’lanja’oly xuka demna’xe. Visko’ta’il ,il’ma’ta ‘mesu, het.
2S-SBJ1-ask about heart-GEN1S. Say-NEG-IMP2S ,2S-be_able-NEG (INF)see, it.
You probably as about my [purely metaphorical] heart. Don’t say that you cannot see.

Never gonna give you up, never gonna let you down
Xe’ki’xan’ta ‘nesyk il, xe’ki’xan’ta ‘uvuk il

Never gonna run around and desert you
Xe’ki’xan’ta ‘sydi ulsihan ji ‘tes il

Never gonna make you cry, never gonna say goodbye
Xe’ki’xan’ta ‘lija ‘sil, xe’ki’xan’ta ‘duxu il

Never gonna tell a lie and hurt you.
Xe’ki’xan’ta ‘vurak il’han, xe’tanmi.

Never gonna give you up, never gonna let you down
Xe’ki’xan’ta ‘nesyk il, xe’ki’xan’ta ‘uvuk il

Never gonna run around and desert you
Xe’ki’xan’ta ‘sydi ulsihan ji ‘tes il

Never gonna make you cry, never gonna say goodbye
Xe’ki’xan’ta ‘lija ‘sil, xe’ki’xan’ta ‘duxu il

Never gonna tell a lie and hurt you.
Xe’ki’xan’ta ‘vurak il’han, xe’tanmi.

We’ve known each other for so long
Xen’nitura xen asty’jet.

Your heart’s been aching, but you’re too shy to say it
Demna’het’il mi’tore ,il’xone, venil

Inside we both know what’s been going on
Xen’sikeva ‘ltimki, ‘siriva.

We know the game and we’re gonna play it.
Xen’ki milhan’het. Xen’ki’kimara.

And if you ask me how I’m feeling, don’t tell me you’re too blind to see.
Il’lanja’oly xuka demna’xe. Visko’ta’il ,il’ma’ta ‘mesu, het.

Never gonna give you up, never gonna let you down
Xe’ki’xan’ta ‘nesyk il, xe’ki’xan’ta ‘uvuk il

Never gonna run around and desert you
Xe’ki’xan’ta ‘sydi ulsihan ji ‘tes il

Never gonna make you cry, never gonna say goodbye
Xe’ki’xan’ta ‘lija ‘sil, xe’ki’xan’ta ‘duxu il

Never gonna tell a lie and hurt you.
Xe’ki’xan’ta ‘vurak il’han, xe’tanmi.

Never gonna give you up, never gonna let you down
Xe’ki’xan’ta ‘nesyk il, xe’ki’xan’ta ‘uvuk il

Never gonna run around and desert you
Xe’ki’xan’ta ‘sydi ulsihan ji ‘tes il

Never gonna make you cry, never gonna say goodbye
Xe’ki’xan’ta ‘lija ‘sil, xe’ki’xan’ta ‘duxu il

Never gonna tell a lie and hurt you.
Xe’ki’xan’ta ‘vurak il’han, xe’tanmi.

Have fun getting the melody out of your head :)

Edit: Some reactions came via IRC:

<@Starblaydia> ‘We are not foreign in the area of love. You know the social
conventions and I do as well.’ XD
<+Rejistania> well, rejistanian does express things a bit strange at times
<@Starblaydia> little bit, yes

I think that it is important to realize that our natlangs do that just as much. We grew up in a specific set of oddities and can only react to that either by acceptance (or ignorance) or by consciously confronting it with a system that is differently strange. And constructing these differently strange systems is one of the things which make me conlang.

< B-rat> a language is complete when you can rick roll people in it

I like that definition of completeness.

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