I ran into a little trouble with smcf-ru_RU.mo, but managed to resolve it by changing
line 37 of /wp-content/pluginssimplemodal-contact-form-smcf/smcf.php :
load_plugin_textdomain("smcf", false, SMCF_DIR . "/lang/");
load_plugin_textdomain('smcf', false, dirname( plugin_basename(__FILE__) ) . '/lang');
,as nbourgeo suggested here (HUGE thanks, nbourgeo!)
Those topic is ~1 year old, describes SMFC v1.2.6 (with 1.2.9 relevant) and is closed.
Still, 1.2.9 has the same line 37 & the same issue.
Eric, if I understand everything right, and this is actually a bug, won't you please make an official update out of this?