Thanks to Koen for noticing!

there's a script in MDL-14152 that is useful for checking integrity of the lang pack - looks like a lot of these errors are caused by the tool waikato uses for the translation - text as part of $a-> should be ignored by the translation tool

mi_wwow_utf8/moodle.php: Warning - "$a->tahi" in and may not be ok, allowed options are: $a->one, $a->two
mi_wwow_utf8/moodle.php: Warning - "$a->rua" in and may not be ok, allowed options are: $a->one, $a->two
mi_wwow_utf8/moodle.php: Warning - "$a->ingoatuatahi" in emailpasswordchangeinfo may not be ok, allowed options are: $a->firstname, $a->sitename, $a->link, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->ingoat" in emailpasswordchangeinfo may not be ok, allowed options are: $a->firstname, $a->sitename, $a->link, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->hono" in emailpasswordchangeinfo may not be ok, allowed options are: $a->firstname, $a->sitename, $a->link, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->ingoatuatahi" in emailpasswordchangeinfodisabled may not be ok, allowed options are: $a->firstname, $a->sitename, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->ingoat" in emailpasswordchangeinfodisabled may not be ok, allowed options are: $a->firstname, $a->sitename, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->ingoatuatahi" in emailpasswordchangeinfofail may not be ok, allowed options are: $a->firstname, $a->sitename, $a->admin, $a->lastname
mi_wwow_utf8/moodle.php: Warning - "$a->ingoat" in emailpasswordchangeinfofail may not be ok, allowed options are: $a->firstname, $a->sitename, $a->admin, $a->lastname
mi_wwow_utf8/filters.php: Warning - "$a->hapa" in courserolelabelerror may not be ok, allowed options are: $a->label, $a->coursename
mi_wwow_utf8/filters.php: Warning - "$a->ingoamahinga" in courserolelabelerror may not be ok, allowed options are: $a->label, $a->coursename
mi_wwow_utf8/filters.php: Warning - "$a->i" in datelabelisbetween may not be ok, allowed options are: $a->label, $a->after, $a->before
mi_wwow_utf8/filters.php: Warning - "$a->tapanga" in profilelabel may not be ok, allowed options are: $a->label, $a->profile, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->k" in profilelabel may not be ok, allowed options are: $a->label, $a->profile, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->kaiwhakamahi" in profilelabel may not be ok, allowed options are: $a->label, $a->profile, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->uara" in profilelabel may not be ok, allowed options are: $a->label, $a->profile, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->tapanga" in profilelabelnovalue may not be ok, allowed options are: $a->label, $a->profile, $a->operator
mi_wwow_utf8/filters.php: Warning - "$a->k" in profilelabelnovalue may not be ok, allowed options are: $a->label, $a->profile, $a->operator
mi_wwow_utf8/filters.php: Warning - "$a->kaiwhakamahi" in profilelabelnovalue may not be ok, allowed options are: $a->label, $a->profile, $a->operator
mi_wwow_utf8/filters.php: Warning - "$a->tapanga" in selectlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->kaiwhakamahi" in selectlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->uara" in selectlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->tapanga" in textlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->kaiwhakamahi" in textlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->uara" in textlabel may not be ok, allowed options are: $a->label, $a->operator, $a->value
mi_wwow_utf8/filters.php: Warning - "$a->tapanga" in textlabelnovalue may not be ok, allowed options are: $a->label, $a->operator
mi_wwow_utf8/filters.php: Warning - "$a->kaiwhakamahi" in textlabelnovalue may not be ok, allowed options are: $a->label, $a->operator
mi_wwow_utf8/form.php: Warning - "$a->h" in err_rangelength may not be ok, allowed options are: $a->format
mi_wwow_utf8/tag.php: Warning - "$a->tatau" in thingstaggedwith may not be ok, allowed options are: $a->name, $a->count
mi_wwow_utf8/qtype_calculated.php: ERROR - Malformed "$a->[space]" in trueanswerinsidelimits, allowed options are: $a->correct, $a->true
mi_wwow_utf8/quiz_grading.php: Warning - "$a->ngana" in gradingattempt may not be ok, allowed options are: $a->attempt, $a->fullname
mi_wwow_utf8/quiz_grading.php: Warning - "$a->ingoakatoa" in gradingattempt may not be ok, allowed options are: $a->attempt, $a->fullname
mi_wwow_utf8/data.php: Warning - "$a->missing_k" in directorynotapreset may not be ok, allowed options are: $a->directory, $a->missing_files
mi_wwow_utf8/question.php: Warning - "$a->w" in movedquestionsandcategories may not be ok, allowed options are: $a->oldplace, $a->newplace
mi_wwow_utf8/question.php: Warning - "$a->w" in movedquestionsandcategories may not be ok, allowed options are: $a->oldplace, $a->newplace
mi_wwow_utf8/question.php: Warning - "$a->kuihiingoa" in questionaffected may not be ok, allowed options are: $a->qurl, $a->name, $a->qtype, $a->quizname, $a->coursename
mi_wwow_utf8/question.php: Warning - "$a->msahingaingoa" in questionaffected may not be ok, allowed options are: $a->qurl, $a->name, $a->qtype, $a->quizname, $a->coursename
mi_wwow_utf8/mnet.php: Warning - "$a->wwwIomatua" in userchangepasswordlink may not be ok, allowed options are: $a->wwwroot, $a->description
mi_wwow_utf8/mnet.php: Warning - "$a->whaka" in userchangepasswordlink may not be ok, allowed options are: $a->wwwroot, $a->description
mi_wwow_utf8/qtype_match.php: Warning - "$a->q" in notenoughquestions may not be ok, allowed options are: $a
mi_wwow_utf8/feedback.php: Warning - "$a->ingoawhakamahi" in emailteachermail may not be ok, allowed options are: $a->username, $a->feedback, $a->url
mi_wwow_utf8/feedback.php: Warning - "$a->ingoawhakamahi" in emailteachermailhtml may not be ok, allowed options are: $a->username, $a->feedback, $a->url