Even with careful planning and preparation, data collection in multilingual contexts can still be prone to biases and errors that can affect the quality and accuracy of your data. Sampling bias, for instance, occurs when your sample is not representative of your population, and does not reflect the diversity and variation of languages and cultures. To counteract this, you should use appropriate sampling methods and criteria, and ensure that your sample size is large enough and balanced enough to capture the relevant differences and similarities among your respondents. Response bias is another common source of errors, which happens when respondents do not answer truthfully or accurately due to various factors such as social desirability, acquiescence, extremity, or non-response. To avoid this, you should design your questions to be clear, neutral, and relevant, as well as employ techniques such as randomization, anonymity, or incentives to reduce the influence of these factors. Lastly, measurement bias occurs when questions, scales, or indicators are not equivalent or comparable across languages and cultures. To prevent this from happening, you should use standardized or validated instruments, or conduct cross-cultural validation and adaptation of your instruments to ensure that they are culturally appropriate and consistent.