kivy label fail

gistfile1.txt

[size=23]mirë dita[\size] [size=30]guàtertag[\size] [size=21]dana esteline[\size] [size=27]صباح الخير[\size] [size=24]chlomo[\size] [size=29]barev[\size] [size=17]grüß gott[\size] [size=24]salam[\size] [size=29]ani sogomen[\size] [size=29]me sha'she[\size] [size=17]n'dja arè[\size] [size=17]egunon[\size] [size=23]menyéga[\size] [size=29]vitaju[\size] [size=17]Прывiтанне[\size] [size=16]namaskar[\size] [size=21]ass-iyessbhène[\size] [size=20]inda wadou[\size] [size=15]ayo[\size] [size=25]ka tiana[\size] [size=22]dobardan[\size] [size=22]demat[\size] [size=17]добър ден[\size] [size=23]mingalaba[\size] [size=20]bon dia[\size] [size=27]hafa adai[\size] [size=24]osiyo[\size] [size=16]你好[\size] [size=28]de da[\size] [size=28]bonghjornu[\size] [size=16]bok[\size] [size=28]dobrý den[\size] [size=29]goddag[\size] [size=23]salâm[\size] [size=29]mat ni kani[\size] [size=30]anissoroma[\size] [size=27]alapiale[\size] [size=27]goede morgen[\size] [size=30]ékooni[\size] [size=19]hello[\size] [size=16]bonan tagon[\size] [size=18]tere[\size] [size=24]mbolo[\size] [size=23]hey[\size] [size=20]yadra[\size] [size=25]hyvää päivää[\size] [size=26]moi[\size] [size=29]hoeien nuh'nt[\size] [size=25]bonjour[\size] [size=24]ha[\size] [size=26]bondi[\size] [size=23]diarama[\size] [size=15]ola[\size] [size=15]bonjou[\size] [size=25]gamarjoba [\size] [size=22]hallo[\size] [size=15]gia[\size] [size=21]mba'éichapa[\size] [size=23]kem cho[\size] [size=29]bonjou[\size] [size=16]ina kwana[\size] [size=30]aloha[\size] [size=26]shalom[\size] [size=26]namaste[\size] [size=27]nyob zoo[\size] [size=24]jó napot kívánok[\size] [size=30]goðan dagin[\size] [size=26]ndeewo[\size] [size=18]selamat siang [\size] [size=19]ullaakkut[\size] [size=25]dia duit[\size] [size=25]ciao[\size] [size=21]konnichi wa [\size] [size=26]ohayô  [\size] [size=15]nliwalè[\size] [size=20]azul[\size] [size=21]chumreap suor[\size] [size=17]mwaramutsé[\size] [size=23]annyǒng hashimnikka[\size] [size=30]gna vin kazô[\size] [size=27]rojbas[\size] [size=26]sabai di[\size] [size=28]salve[\size] [size=24]labdien[\size] [size=27]ciâo[\size] [size=16]mbote[\size] [size=16]laba diena [\size] [size=19]labas rytas[\size] [size=28]hallo[\size] [size=19]moien[\size] [size=15]dobar den[\size] [size=18]manao ahoana[\size] [size=23]selamat pagi[\size] [size=27]selamat petang[\size] [size=15]namaskaram[\size] [size=29]merħba[\size] [size=16]befa[\size] [size=16]kia ora[\size] [size=15]mari-mari[\size] [size=26]ozông tchî[\size] [size=28]kia bo[\size] [size=20]doangouam[\size] [size=17]sain baina uu [\size] [size=28]né yibéogo[\size] [size=17]namaste[\size] [size=28]boujou[\size] [size=18]warro[\size] [size=23]wharro[\size] [size=21]god dag[\size] [size=29]bon jorn[\size] [size=25]heill[\size] [size=19]bon dia[\size] [size=30]stele mashe[\size] [size=23]dorood[\size] [size=27]dzień dobry[\size] [size=18]bom dia[\size] [size=25]oi[\size] [size=29]sat sri akal[\size] [size=24]latcho divès[\size] [size=18]bună ziua[\size] [size=15]Добрый день[\size] [size=28]bures[\size] [size=30]talofa[\size] [size=29]bara mo [\size] [size=28]bara Âla  [\size] [size=27]bara âla[\size] [size=22]bona die[\size] [size=29]hallo[\size] [size=29]dobar dan[\size] [size=27]jéjé[\size] [size=27]mhoro[\size] [size=26]acho saiin[\size] [size=27]ayubowan[\size] [size=17]dobré ráno  [\size] [size=27]dobrý deň  [\size] [size=21]dobrý večer[\size] [size=27]pozdravljen[\size] [size=18]pozdravljena[\size] [size=19]pozdravljeni  [\size] [size=30]dobro jutro[\size] [size=23]lahko noč  [\size] [size=23]živijo[\size] [size=18]dobar dan[\size] [size=15]an mou diom[\size] [size=17]buenos días[\size] [size=22]yambo[\size] [size=30]god dag[\size] [size=28]guete tog[\size] [size=25]chlomo[\size] [size=29]kumusta[\size] [size=20]'ia ora na[\size] [size=27]wayi wan[\size] [size=17]azul[\size] [size=16]vanakam[\size] [size=25]namaskaram[\size] [size=15]สวัสดีค่ะ[\size] [size=23]สวัสดีครับ[\size] [size=17]tashi delek[\size] [size=20]malo e lelei[\size] [size=26]wossoura[\size] [size=30]merhaba[\size] [size=25]dzéchbur  [\size] [size=23]dzéchbureś [\size] [size=15]Вітаю[\size] [size=30]Добрий день[\size] [size=27]as salaamo alaikum[\size] [size=15]assalomu alaykum[\size] [size=23]chào[\size] [size=28]malo te mauli[\size] [size=16]bondjoû[\size] [size=18]hylo[\size] [size=25]bonjou[\size] [size=20]nangadef[\size] [size=29]e karo[\size] [size=16]sawubona[\size] [size=22]bom[\size]

here is how i read it:

 with open('resources/txt/hello.txt', 'rb') as f:
            text = reduce(operator.add, map( lambda x: "[\size] [size=%d]%s" % (random.randint(15, 30), x) ,
                unicode(f.read().lower(), 'utf-8').split('\n')), "")[8:-10]
            print text