15 January – Hangul Day (North Korea)
21 February – International Mother Language Day
20 March – Journée internationale de la francophonie (France)
4 March – National Grammar Day (USA)
20 April – Chinese Language Day
22 April – Modern English Usage Day (Fowler)
23 April – English Language Day (UN)
6 June – Russian Language Day (Alexander Pushkin’s birthday)
2nd Saturday in September – Tag der deutschen Sprache (“German Language Day”)
19 September – International Talk Like a Pirate Day
24 September – National Punctuation Day (USA)
26 September – European Day of Languages (Council of Europe)
30 September – International Translation Day
9 October – Hangul Day (South Korea)
12 October – Dia de la Hispanidad (Spanish Language Day)
13 October – English Language Day (UK)
16 October – National Dictionary Day (USA) in honour of Noah Webster
22 October – Wereldstotterdag WSD, ISAD (International Stuttering Awareness Day)
22 October –INTERNATIONAL CAPS LOCK DAY
30 October 2012 – Talk Like Jane Austen Day (In celebration of the 201st anniversary of the publishing of Sense and Sensibility)
18 December – Arabic Language Day
September 19th: international talk like a pirate day
http://www.timeanddate.com/holidays/world/talk-like-pirate-day
second Saturday in September: Tag der deutschen Sprache http://de.wikipedia.org/wiki/Verein_Deutsche_Sprache#Tag_der_deutschen_Sprache
OCT 22 INTERNATIONAL CAPS LOCK DAY
http://en.wikipedia.org/wiki/Caps_lock#International_Caps_Lock_Day
22 oktober wereldstotterdag WSD, ISAD (International Stuttering Awareness Day)
http://belgische-stottervereniging.be/wsd-oorsprong.html
13 April Scrabble Day http://bbcnewsday.com/lifestyle/scrabble-day-2015-19-pictures-that-show-just-how-much-we-love-scrabble/#axzz3a0P0qneT