You could reduce duplication by using an object mapping the selectors (class names in this case) to their responses

    var selectorToResponse = {
      '.ottogi': 'Ottogi',
      '.sajo': 'Sajo Hapyo',
      '.natura': 'Natura Bogata',
      '.maloo': 'TOO Maлy',
      '.dongush': 'Dongsuh',
      '.may': 'OOO Maй'
    }

Note, that for the first case (`.ottogi`) you are changing the text to Ottogi if it is Ottogi which has no change, so it can be removed.

    var selectorToResponse = {
      '.sajo': 'Sajo Hapyo',
      '.natura': 'Natura Bogata',
      '.maloo': 'TOO Maлy',
      '.dongush': 'Dongsuh',
      '.may': 'OOO Maй'
    }

From here you could loop over the object entries using a [`for...in`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in) loop and define the event handlers. This way you only have to add further entries to `selectorToResponse` instead of duplicating.

    var selectorToReponse = {
      '.ottogi': 'Ottogi',
      '.sajo': 'Sajo Hapyo',
      '.natura': 'Natura Bogata',
      '.maloo': 'TOO Maлy',
      '.dongush': 'Dongsuh',
      '.may': 'OOO Maй'
    }
    
    // Prefixing with $ to denote that is an element, not text etc
    var $header = $('.inner-container h1')
    
    for (var selector in selectorToResponse) {
      $(selector).click = function () {
        // using $header.text() inside function so that is current header text
        // `text` never changed in your example
        if ($header.text() === 'Ottogi') { // using === instead of ==
          var response = selectorToResponse[selector]
    
          $header.text(response)
        }
      }
    }

**Notes**

Above uses strict equality comparison (`===`) instead of abstract equality comparison (`==`). https://developer.mozilla.org/en/docs/Web/JavaScript/Equality_comparisons_and_sameness