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Language particularly the mother tongue is probably sensitive index for exploring the ethnic composition of the populations. Statistics based on the ability to speak a specified language or languages are perhaps the least useful measures for identifying the ethnic groups but they have a utility in connecting with the problems of educating and communicating with linguistic minorities and they are means of pointing out heterogeneity of languages within the country and measuring their individual strength.

Such data are specially important in countries where more than one official language is being spoken. Two major types of errors in census data leads to over and under enumeration of the population in census the first one being the coverage errors and the second one being the content errors which affect the accuracy of the information collected for the covered population. Since coverage errors occurs most frequently in a population or subgroup than others it may affect not only the absolute number of persons in a given category but also their relative distribution.

Levels and patterns of coverage and content errors differs widely across countries and even from census to census in a given country. Data on mother tongue are designed to identify the cultural or ethnic groups in population by languages reported to have been spoken in early childhood presumably before immigration. Objective and Aim of the Study In this study I wanted to test the hypothesis the relation of languages spoken ( first and second languages) in country by the population in relation to birth in that country or may be an immigrant.

Methodology We randomly collected data from a population called R and interviewed them on the languages spoken( first and second languages) and were also asked whether they were born in that country or not. While making this study we wanted to minimize the predicted errors of missing data, coverage errors and content errors. We simply left out the missing data while doing our analysis. Results Fig 1 reflects the data collected in the percentage of the population( valid data country born and preference of language spoken) versus the missing data percentage of population which was left out from the survey Fig 2: Series one reflects the frequency of population speaking language in the country versus the series 2 whether born or not born in that country.

The correlation coefficient was calculated about the percentages of population surveyed and language spoken found that the correlation co-efficient was 1 which indicated that the language spoken is definitely related to the birth in a country that means the more the population born in a particular country more he speaks the first or native language of that