Is learning Danish hard? Some describe it as the language of a thousand vowels and swallowed consonants. What about immigrants in Denmark? While research has shown that language proficiency plays an important role in both socio-cultural integration and employability of immigrants, knowledge on the linguistic problems facing non-native learners of Danish is extremely limited. From 2014 to 2018, Denmark received 131.032 immigrants from non-Western countries, which corresponds to more than 2% of the total population in 2019. Roughly one third of these people come from Arabic-speaking countries, and of these almost 75% come from Syria. Nevertheless, there is little research on Danish as a non-native language. The EU-funded LxDP project studies non-native speech learning of Danish focusing on the unnatural aspects of the phonology claimed to be the root of the difficulties in the acquisition of Danish. In order to gain a thorough understanding of how unnatural aspects of Danish phonology affect non-native speech learning, the LxDP project studied the effect of different types of theoretically predicted difficulties in the comprehension and production of Danish in Syrian Arabic speaking learners. This is the first time non-native speech learning of Danish is studied from a laboratory perspective. The findings will help improve language teaching materials for non-native learners, which can subsequently improve integration.