Hi German,
Here's what i just find now, with lot (but not all) of language files installed:
pt/taskchain.php:965:$string['sourcefilenotfound'] = 'Ficheiro de origem não encontrado (ou vazio): {$a';
gl/assign.php:171:$string['editsubmissionother'] = 'Editar entregas para {$a';
lv/assign.php:166:$string['gradeabovemaximum'] = 'Vērtējumam ir jābūt mazākam vai vienādam ar {$a).';
sk/choicegroup.php:126:<li><a href="{$a->linkgroups">spravovať skupiny kurzov</a></li>
sv_fi/grading.php:28:$string['activemethodinfonone'] = 'Ingen avancerad utvärderingsmetod är vald för området \'{$a->arUtvärdering med vitsord kommer att användas.';
ga/error.php:246:$string['groupunknown'] = 'Grúpa {$a{ gan bheith gaolmhar le cúrsa sainithe';
ga/question.php:359:$string['yourfileshoulddownload'] = 'Ba chóir go dtosódh do chomhad easpórtála ag íoslódail go gairid. "Mura dtarlaíonn sé, le do thoil <a href+”{$a”>cliceáil anseo</a>.';
ga/role.php:197:$string['inactiveformorethan'] = 'Neamhghníomhach le níos mó ná {$a->timeperiod)';
lt/assign.php:414:$string['submissioncopiedsmall'] = 'Jūs nukopijavote ankstesnės veiklos {$a->assignment) pateikimą';
lt/assign.php:415:$string['submissioncopiedtext'] = 'Jūs nukopijavote ankstesnės veiklos "{$a->assignment)" pateikimą
lt/calendar.php:101:$string['eventendtimewrapped'] = '{$a) (Pabaiga)';
lt/debug.php:45:$string['mustbeoveride'] = 'Abstraktusis {$a) metodas turi būti pakeistas.';
el/block_quickmail.php:51:$string['delete_confirm'] = 'Είστε σίγουροι για τη διαγραφή του μηνύματος με τις ακόλουθες λεπτομέρειες; {$a)';
de/tool_recyclebin.php:47:$string['eventitemdeleted_desc'] = 'Eintrag mit der ID {$a->objectid] gelöscht.';
da/error.php:155:$string['cannotupdaterecord'] = 'Kan ikke opdatere post-id {$a)';
ro/portfolio.php:167:$string['plugincouldnotpackage'] = 'Nu s-a putut realiza pachetul pentru exportul datelor dumneavoastră: eroarea originală a fost {$a';
zh_cn/mnet.php:88:$string['hostexists'] = '已有使用此主机名的主机记录(可以删除它)。<a href="{$a">点击这里</a>编辑此记录。';
ckb/backup.php:114:$string['error_block_for_module_not_found'] = 'ئۆرفان بلۆک بوونە ({id: {$a->bid) بۆ یەکەى کۆرس ({id: {$a->mid) دۆزرایەوە. ئەو بلۆکە نابێت بگەرێتەوە سەر';
ckb/backup.php:115:$string['error_course_module_not_found'] = 'کۆرسى مۆدل ئورفا دۆزرایەوە ({id: {$a) . ئەم مۆدلە پشتگیرى نەکراوە';
ckb/bulkusers.php:34:$string['confirmmessage'] = 'دلنیایى تۆ دەتەوێت ئەم پەیامەى سەرەوە بنێرى بۆئەم بەکارهێنەرانە؟{br />{$a>';
ckb/chat.php:69:$string['messageenter'] = '{$a تازە هاتە نێو ئەم چاتە';
ckb/chat.php:70:$string['messageexit'] = '{$a ئەم چاتەی جێهێشت';
km/assign.php:391:{$a->url';
is/plugin.php:42:$string['requiredby'] = 'Krafist af: {$a]';
he/quiz_overview.php:78:$string['studentingrouplong'] = '\'{$a-> coursestudent בקבוצה זאת';
he/workshopform_comments.php:28:$string['addmoredimensions'] = '{$a) אמות־מידה נוספות';
te/auth_mnet.php:38:$string['sso_mnet_login_refused'] = 'వినియోగదారు పేరు {$a->';
te/completion.php:38:$string['affectedactivities'] = 'ఈ మార్పులు క్రింది <b>{$a </b> కార్యకలాపాలు లేదా వనరులను ప్రభావితం చేస్తుంది:';
te/hvp.php:345:$string['welcomecommunity'] = 'మీరు H5P ను ఆనందిస్తారని మరియు మా పెరుగుతున్న సంఘంలో మా <a {$a->forums> ఫోరమ్స్ ద్వారా </a> నిమగ్నమవ్వాలని ఆశిస్తున్నాము.';
hu/assign.php:213:Megtekintheti a leadott munka mellett: {$a->url.';
pl/iassign.php:276:$string['import_file'] = 'Plik aktywności {$a lub skompresowany (zip):';
pl/moodle.php:1436:$string['numweek'] = '{$a{ tydzień';
Some lines don't include "$string[", these are strings defined on several lines, but they contain a problem too.
HTH,
Séverin