Since considering your OP ("... replace [...] with &#91;...&#93; ...") I've seen your "Edit:" (just 10 minutes ago). It's a pity that whoever sent you "direct comments", didn't actually post those comments here: the issue could have been discussed. As I said in my reply, "Using <pre> ... and <tt> ... is absolutely fine for non-ASCII text." — this has been standard practice for many years.

Thanks for making the effort to provide a fix. Unfortunately, the autogenerated links still exist in the original, and the new additions are pretty much unreadable due to the plethora of &#nnnn; entities.

I took the two blocks of "c-tags" text, and ran them through a quick-and-dirty script that I threw together to convert them to what the two, original <pre> blocks should have looked like.

#!/usr/bin/env perl

use strict;
use warnings;

my $c1 = <<'C1';
Pronunciation     /&#712;b&#603;t&#601;ld&#658;u&#720;z, &#712;bi&#720
+;t&#601;l-, -d&#658;u&#720;s/[1][2]
Right ascension     05h 55m 10.30536s[3]
Declination     +07° 24&#8242; 25.4304&#8243;[3]
Apparent magnitude (V)     +0.50[4] (0.0–1.6[5])
Characteristics
Evolutionary stage     Red supergiant
Spectral type     M1–M2 Ia–ab[6]
Apparent magnitude (J)     &#8722;3.00[7]
Apparent magnitude (K)     &#8722;4.05[7]
U&#8722;B color index     +2.06[4]
B&#8722;V color index     +1.85[4]
Variable type     SRc[8]
Absolute magnitude (MV)    &#8722;5.85[12]
C1

my $c2 = <<'C2';
fritz@laptop:~/Documents$ trans :ru betelgeuse -p
betelgeuse

&#1073;&#1077;&#1090;&#1077;&#1083;&#1100;&#1075;&#1077;&#1081;&#1079;
+&#1077;
(betel'geyze)

Translations of betelgeuse
[ English -> &#1056;&#1091;&#1089;&#1089;&#1082;&#1080;&#1081; ]

betelgeuse
    &#1073;&#1077;&#1090;&#1077;&#1083;&#1100;&#1075;&#1077;&#1081;&#1
+079;&#1077;, &#1041;&#1077;&#1090;&#1077;&#1083;&#
1100;&#1075;&#1077;&#1081;&#1079;&#1077;
fritz@laptop:~/Documents$
C2

my %c2pre = ('[' => '&#91;', ']' => '&#93;');

for my $c ($c1, $c2) {
    $c =~ s/([\[\]])/$c2pre{$1}/eg;
    print "<pre>\n$c</pre>\n";
    print '-' x 60, "\n";
}
[download]

Here's the output:

<pre>
Pronunciation     /&#712;b&#603;t&#601;ld&#658;u&#720;z, &#712;bi&#720
+;t&#601;l-, -d&#658;u&#720;s/&#91;1&#93;&#91;2&#93;
Right ascension     05h 55m 10.30536s&#91;3&#93;
Declination     +07° 24&#8242; 25.4304&#8243;&#91;3&#93;
Apparent magnitude (V)     +0.50&#91;4&#93; (0.0–1.6&#91;5&#93;)
Characteristics
Evolutionary stage     Red supergiant
Spectral type     M1–M2 Ia–ab&#91;6&#93;
Apparent magnitude (J)     &#8722;3.00&#91;7&#93;
Apparent magnitude (K)     &#8722;4.05&#91;7&#93;
U&#8722;B color index     +2.06&#91;4&#93;
B&#8722;V color index     +1.85&#91;4&#93;
Variable type     SRc&#91;8&#93;
Absolute magnitude (MV)    &#8722;5.85&#91;12&#93;
</pre>
------------------------------------------------------------
<pre>
fritz@laptop:~/Documents$ trans :ru betelgeuse -p
betelgeuse

&#1073;&#1077;&#1090;&#1077;&#1083;&#1100;&#1075;&#1077;&#1081;&#1079;
+&#1077;
(betel'geyze)

Translations of betelgeuse
&#91; English -> &#1056;&#1091;&#1089;&#1089;&#1082;&#1080;&#1081; &#9
+3;

betelgeuse
    &#1073;&#1077;&#1090;&#1077;&#1083;&#1100;&#1075;&#1077;&#1081;&#1
+079;&#1077;, &#1041;&#1077;&#1090;&#1077;&#1083;&#1100;&#1075;&#1077;
+&#1081;&#1079;&#1077;
fritz@laptop:~/Documents$
</pre>
------------------------------------------------------------
[download]

Before wrapping that output in <code>...</code>, I ran a "Preview": both <pre> blocks look fine, with the autogenerated links no longer there, and the Russian translation appearing in Cyrillic.

Please replace your two, original <pre> blocks with those above, and remove the two "Same data with c-tags: ..." sections. That should fix up everything and we can get rid of the consideration. Thankyou.